diff --git a/PayfritWorks/Models/OrderLineItem.swift b/PayfritWorks/Models/OrderLineItem.swift
index 5190873..af6bc89 100644
--- a/PayfritWorks/Models/OrderLineItem.swift
+++ b/PayfritWorks/Models/OrderLineItem.swift
@@ -9,6 +9,9 @@ struct OrderLineItem: Identifiable {
     let quantity: Int
     let remark: String
     let isModifier: Bool
+    let isCheckedByDefault: Bool
+    let isInvertedGroup: Bool
+    let removedDefaults: [String]  // Array of item names that were removed from inverted groups
 
     var id: Int { lineItemId }
 
@@ -26,5 +29,21 @@ struct OrderLineItem: Identifiable {
         if let b = json["IsModifier"] as? Bool { isModifier = b }
         else if let i = json["IsModifier"] as? Int { isModifier = i == 1 }
         else { isModifier = false }
+
+        // Inverted group fields
+        if let b = json["IsCheckedByDefault"] as? Bool { isCheckedByDefault = b }
+        else if let i = json["IsCheckedByDefault"] as? Int { isCheckedByDefault = i == 1 }
+        else { isCheckedByDefault = false }
+
+        if let b = json["IsInvertedGroup"] as? Bool { isInvertedGroup = b }
+        else if let i = json["IsInvertedGroup"] as? Int { isInvertedGroup = i == 1 }
+        else { isInvertedGroup = false }
+
+        // Removed defaults array
+        if let arr = json["RemovedDefaults"] as? [String] {
+            removedDefaults = arr
+        } else {
+            removedDefaults = []
+        }
     }
 }
diff --git a/PayfritWorks/Models/TierStatus.swift b/PayfritWorks/Models/TierStatus.swift
index 1d672e9..f4d08fc 100644
--- a/PayfritWorks/Models/TierStatus.swift
+++ b/PayfritWorks/Models/TierStatus.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-// MARK: - Tier Status (from tierStatus.cfm)
+// MARK: - Tier Status (from tierStatus.php)
 
 struct TierStatus: Codable {
     var tier: Int
@@ -98,7 +98,7 @@ struct TierStatus: Codable {
     }
 }
 
-// MARK: - Ledger Response (from ledger.cfm)
+// MARK: - Ledger Response (from ledger.php)
 
 struct LedgerResponse: Codable {
     var entries: [LedgerEntry]
diff --git a/PayfritWorks/Services/APIService.swift b/PayfritWorks/Services/APIService.swift
index 68dc29d..fd15218 100644
--- a/PayfritWorks/Services/APIService.swift
+++ b/PayfritWorks/Services/APIService.swift
@@ -253,7 +253,7 @@ actor APIService {
     // MARK: - Auth
 
     func login(username: String, password: String) async throws -> LoginResponse {
-        let json = try await postJSON("/auth/login.cfm", payload: [
+        let json = try await postJSON("/auth/login.php", payload: [
             "username": username,
             "password": password
         ])
@@ -293,7 +293,7 @@ actor APIService {
     // MARK: - OTP Login
 
     func sendLoginOtp(phone: String) async throws -> SendOtpResponse {
-        let json = try await postJSON("/auth/loginOTP.cfm", payload: [
+        let json = try await postJSON("/auth/loginOTP.php", payload: [
             "phone": phone
         ])
 
@@ -309,7 +309,7 @@ actor APIService {
     }
 
     func verifyLoginOtp(uuid: String, otp: String) async throws -> LoginResponse {
-        let json = try await postJSON("/auth/verifyLoginOTP.cfm", payload: [
+        let json = try await postJSON("/auth/verifyLoginOTP.php", payload: [
             "uuid": uuid,
             "otp": otp
         ])
@@ -363,7 +363,7 @@ actor APIService {
             throw APIError.serverError("User not logged in")
         }
 
-        let json = try await postJSON("/auth/profile.cfm", payload: [
+        let json = try await postJSON("/auth/profile.php", payload: [
             "UserID": uid
         ])
 
@@ -393,7 +393,7 @@ actor APIService {
         if let em = email { payload["Email"] = em }
         if let ph = phone { payload["Phone"] = ph }
 
-        let json = try await postJSON("/auth/profile.cfm", payload: payload)
+        let json = try await postJSON("/auth/profile.php", payload: payload)
 
         guard ok(json) else {
             throw APIError.serverError("Failed to update profile: \(err(json))")
@@ -407,7 +407,7 @@ actor APIService {
             throw APIError.serverError("User not logged in")
         }
 
-        let json = try await postJSON("/workers/myBusinesses.cfm", payload: [
+        let json = try await postJSON("/workers/myBusinesses.php", payload: [
             "UserID": uid
         ])
 
@@ -429,7 +429,7 @@ actor APIService {
             payload["CategoryID"] = cid
         }
 
-        let json = try await postJSON("/tasks/listPending.cfm", payload: payload)
+        let json = try await postJSON("/tasks/listPending.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Failed to load tasks: \(err(json))")
         }
@@ -440,7 +440,7 @@ actor APIService {
 
     func acceptTask(taskId: Int) async throws {
         // Flutter only sends TaskID + BusinessID (no UserID)
-        let json = try await postJSON("/tasks/accept.cfm", payload: [
+        let json = try await postJSON("/tasks/accept.php", payload: [
             "TaskID": taskId,
             "BusinessID": businessId
         ])
@@ -463,7 +463,7 @@ actor APIService {
             payload["BusinessID"] = businessId
         }
 
-        let json = try await postJSON("/tasks/listMine.cfm", payload: payload)
+        let json = try await postJSON("/tasks/listMine.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Failed to load my tasks: \(err(json))")
         }
@@ -483,7 +483,7 @@ actor APIService {
         if cancelOrder {
             payload["CancelOrder"] = true
         }
-        let json = try await postJSON("/tasks/complete.cfm", payload: payload)
+        let json = try await postJSON("/tasks/complete.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Failed to complete task: \(err(json))")
         }
@@ -493,14 +493,14 @@ actor APIService {
         let payload: [String: Any] = [
             "TaskID": taskId
         ]
-        let json = try await postJSON("/tasks/completeChat.cfm", payload: payload)
+        let json = try await postJSON("/tasks/completeChat.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Close chat failed: \(err(json))")
         }
     }
 
     func getTaskDetails(taskId: Int) async throws -> TaskDetails {
-        let json = try await postJSON("/tasks/getDetails.cfm", payload: [
+        let json = try await postJSON("/tasks/getDetails.php", payload: [
             "TaskID": taskId
         ])
         guard ok(json) else {
@@ -553,7 +553,7 @@ actor APIService {
             payload["AfterMessageID"] = after
         }
 
-        let json = try await postJSON("/chat/getMessages.cfm", payload: payload)
+        let json = try await postJSON("/chat/getMessages.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Failed to load chat messages")
         }
@@ -573,7 +573,7 @@ actor APIService {
         if let uid = userId { payload["UserID"] = uid }
         if let st = senderType { payload["SenderType"] = st }
 
-        let json = try await postJSON("/chat/sendMessage.cfm", payload: payload)
+        let json = try await postJSON("/chat/sendMessage.php", payload: payload)
         guard ok(json) else {
             throw APIError.serverError("Failed to send message")
         }
@@ -582,7 +582,7 @@ actor APIService {
     }
 
     func markChatMessagesRead(taskId: Int, readerType: String) async throws {
-        let json = try await postJSON("/chat/markRead.cfm", payload: [
+        let json = try await postJSON("/chat/markRead.php", payload: [
             "TaskID": taskId,
             "ReaderType": readerType
         ])
@@ -594,7 +594,7 @@ actor APIService {
     // MARK: - Payout / Tier Endpoints
 
     func getTierStatus() async throws -> TierStatus {
-        let json = try await postJSON("/workers/tierStatus.cfm", payload: [
+        let json = try await postJSON("/workers/tierStatus.php", payload: [
             "UserID": userId ?? 0
         ])
         guard ok(json) else {
@@ -605,7 +605,7 @@ actor APIService {
     }
 
     func createStripeAccount() async throws -> String {
-        let json = try await postJSON("/workers/createAccount.cfm", payload: [
+        let json = try await postJSON("/workers/createAccount.php", payload: [
             "UserID": userId ?? 0
         ])
         guard ok(json) else {
@@ -615,7 +615,7 @@ actor APIService {
     }
 
     func getOnboardingLink() async throws -> String {
-        let json = try await postJSON("/workers/onboardingLink.cfm", payload: [
+        let json = try await postJSON("/workers/onboardingLink.php", payload: [
             "UserID": userId ?? 0
         ])
         guard ok(json) else {
@@ -625,7 +625,7 @@ actor APIService {
     }
 
     func getEarlyUnlockUrl() async throws -> String {
-        let json = try await postJSON("/workers/earlyUnlock.cfm", payload: [
+        let json = try await postJSON("/workers/earlyUnlock.php", payload: [
             "UserID": userId ?? 0
         ])
         guard ok(json) else {
@@ -635,7 +635,7 @@ actor APIService {
     }
 
     func getLedger() async throws -> LedgerResponse {
-        let json = try await postJSON("/workers/ledger.cfm", payload: [
+        let json = try await postJSON("/workers/ledger.php", payload: [
             "UserID": userId ?? 0
         ])
         guard ok(json) else {
@@ -648,7 +648,7 @@ actor APIService {
     // MARK: - Avatar
 
     func getAvatarUrl() async throws -> String? {
-        let json = try await getJSON("/auth/avatar.cfm")
+        let json = try await getJSON("/auth/avatar.php")
         print("[Avatar] Response: \(json)")
         guard ok(json) else {
             print("[Avatar] Response not OK")
@@ -681,7 +681,7 @@ actor APIService {
     /// Get avatar URL for any user by their userId
     func getUserAvatarUrl(userId: Int) async throws -> String? {
         // Try the avatar endpoint with UserID
-        let json = try await postJSON("/auth/avatar.cfm", payload: ["UserID": userId])
+        let json = try await postJSON("/auth/avatar.php", payload: ["UserID": userId])
         print("[Avatar] getUserAvatarUrl(\(userId)) Response: \(json)")
 
         let data = json["DATA"] as? [String: Any] ?? json
@@ -712,7 +712,7 @@ actor APIService {
     // MARK: - Beacon Sharding
 
     func resolveServicePoint(uuid: String, major: Int, minor: Int) async throws -> Int {
-        let json = try await postJSON("/beacon-sharding/resolve_servicepoint.cfm", payload: [
+        let json = try await postJSON("/beacon-sharding/resolve_servicepoint.php", payload: [
             "UUID": uuid,
             "Major": major,
             "Minor": minor
@@ -732,7 +732,7 @@ actor APIService {
     }
 
     func resolveBusiness(uuid: String, major: Int) async throws -> (businessId: Int, businessName: String) {
-        let json = try await postJSON("/beacon-sharding/resolve_business.cfm", payload: [
+        let json = try await postJSON("/beacon-sharding/resolve_business.php", payload: [
             "UUID": uuid,
             "Major": major
         ])
@@ -774,7 +774,7 @@ actor APIService {
     // MARK: - About Info
 
     func getAboutInfo() async throws -> AboutInfo {
-        let json = try await getJSON("app/about.cfm")
+        let json = try await getJSON("app/about.php")
 
         guard ok(json) else {
             throw APIError.serverError(err(json))
diff --git a/PayfritWorks/Views/BusinessSelectionScreen.swift b/PayfritWorks/Views/BusinessSelectionScreen.swift
index c4b8e10..6921937 100644
--- a/PayfritWorks/Views/BusinessSelectionScreen.swift
+++ b/PayfritWorks/Views/BusinessSelectionScreen.swift
@@ -309,15 +309,15 @@ struct BusinessSelectionScreen: View {
             var text = "=== RAW API RESPONSES ===\n\n"
             text += "UserID: \(uid), BusinessID: \(bid)\n\n"
 
-            text += "--- /workers/myBusinesses.cfm ---\n"
+            text += "--- /workers/myBusinesses.php ---\n"
             let bizRaw = await APIService.shared.debugRawJSON(
-                "/workers/myBusinesses.cfm", payload: ["UserID": uid])
+                "/workers/myBusinesses.php", payload: ["UserID": uid])
             text += bizRaw + "\n\n"
 
             if bid > 0 {
-                text += "--- /tasks/listPending.cfm ---\n"
+                text += "--- /tasks/listPending.php ---\n"
                 let taskRaw = await APIService.shared.debugRawJSON(
-                    "/tasks/listPending.cfm", payload: ["BusinessID": bid])
+                    "/tasks/listPending.php", payload: ["BusinessID": bid])
                 text += taskRaw + "\n\n"
             }
 
diff --git a/PayfritWorks/Views/TaskDetailScreen.swift b/PayfritWorks/Views/TaskDetailScreen.swift
index 91edef6..ed64745 100644
--- a/PayfritWorks/Views/TaskDetailScreen.swift
+++ b/PayfritWorks/Views/TaskDetailScreen.swift
@@ -518,14 +518,29 @@ struct TaskDetailScreen: View {
                 }
 
                 ForEach(modifiers) { mod in
+                    // For inverted groups: show removed defaults as "NO {name}"
+                    if mod.isInvertedGroup && !mod.removedDefaults.isEmpty {
+                        ForEach(mod.removedDefaults, id: \.self) { removedName in
+                            Text("- NO \(removedName)")
+                                .font(.caption)
+                                .foregroundColor(.red)
+                        }
+                    }
+
                     let children = d.lineItems.filter { $0.parentLineItemId == mod.lineItemId }
                     if !children.isEmpty {
                         ForEach(children) { child in
-                            Text("- \(mod.itemName): \(child.itemName)")
-                                .font(.caption)
-                                .foregroundColor(.secondary)
+                            // Skip default items in inverted groups (they're unchanged)
+                            if mod.isInvertedGroup && child.isCheckedByDefault {
+                                // Don't display - this is an unchanged default
+                            } else {
+                                Text("- \(mod.itemName): \(child.itemName)")
+                                    .font(.caption)
+                                    .foregroundColor(.secondary)
+                            }
                         }
-                    } else {
+                    } else if !mod.isInvertedGroup {
+                        // Regular modifier (not inverted group)
                         Text("- \(mod.itemName)")
                             .font(.caption)
                             .foregroundColor(.secondary)
diff --git a/test-walkthrough.html b/test-walkthrough.html
index e16bb31..6158e9b 100644
--- a/test-walkthrough.html
+++ b/test-walkthrough.html
@@ -461,7 +461,7 @@ const sections = [
         preconditions: 'Logged in, user has businesses.',
         action: 'After login, observe Business Selection screen.',
         expected: 'Nav title "Select Business". List of businesses with: initial letter in colored square, business name, address/city, status badge (Pending/Active/Inactive), task count or green checkmark. Toolbar: refresh button and ellipsis menu.',
-        onFail: 'Screenshot. Check API response from /workers/myBusinesses.cfm.'
+        onFail: 'Screenshot. Check API response from /workers/myBusinesses.php.'
       },
       {
         id: 'BS02',
@@ -532,7 +532,7 @@ const sections = [
         title: 'Toolbar menu — Debug API',
         preconditions: 'Business Selection screen.',
         action: 'Tap ellipsis menu → "Debug API".',
-        expected: 'Modal sheet appears showing raw JSON from /workers/myBusinesses.cfm and /tasks/listPending.cfm. Monospaced text, "Done" button to dismiss.',
+        expected: 'Modal sheet appears showing raw JSON from /workers/myBusinesses.php and /tasks/listPending.php. Monospaced text, "Done" button to dismiss.',
         onFail: 'Screenshot.'
       },
       {
@@ -570,7 +570,7 @@ const sections = [
         preconditions: 'Selected a business with pending tasks.',
         action: 'Observe the task list screen.',
         expected: 'Nav title = business name. List of task cards with: color bar, category icon (chat = bubble icon), title, location (mappin or bicycle icon), category badge, chat badge if applicable, time ago label.',
-        onFail: 'Screenshot. Check /tasks/listPending.cfm response.'
+        onFail: 'Screenshot. Check /tasks/listPending.php response.'
       },
       {
         id: 'TL02',
@@ -655,7 +655,7 @@ const sections = [
         preconditions: 'Tapped a task from task list.',
         action: 'Observe the task detail screen.',
         expected: 'Loading spinner, then content: customer section (avatar/name/phone), location section (table or delivery), nav bar colored with category color. "Accept Task" button at bottom.',
-        onFail: 'Screenshot. Check /tasks/getDetails.cfm response.'
+        onFail: 'Screenshot. Check /tasks/getDetails.php response.'
       },
       {
         id: 'TD02',
@@ -750,7 +750,7 @@ const sections = [
         title: 'Accept Task — confirm',
         preconditions: 'Accept alert shown.',
         action: 'Tap "Accept".',
-        expected: 'API call to /tasks/accept.cfm. On success, screen dismisses back to task list. Task removed from pending list.',
+        expected: 'API call to /tasks/accept.php. On success, screen dismisses back to task list. Task removed from pending list.',
         onFail: 'Screenshot. Check API response.'
       },
       {
@@ -782,7 +782,7 @@ const sections = [
         title: 'Complete Task — confirm',
         preconditions: 'Complete alert shown.',
         action: 'Tap "Complete".',
-        expected: 'API call to /tasks/complete.cfm. On success, dismisses back to My Tasks. Task moves to Completed filter.',
+        expected: 'API call to /tasks/complete.php. On success, dismisses back to My Tasks. Task moves to Completed filter.',
         onFail: 'Screenshot.'
       },
       {
@@ -844,7 +844,7 @@ const sections = [
         preconditions: 'Worker has accepted tasks.',
         action: 'Select Active tab.',
         expected: 'Shows tasks with status Accepted/In Progress. Each card shows: color bar, title, location, category badge, time ago, status badge.',
-        onFail: 'Screenshot. Verify /tasks/listMine.cfm?FilterType=active response.'
+        onFail: 'Screenshot. Verify /tasks/listMine.php?FilterType=active response.'
       },
       {
         id: 'MT03',
@@ -1008,7 +1008,7 @@ const sections = [
         title: 'HTTP fallback when WebSocket disconnected',
         preconditions: 'WebSocket not connected.',
         action: 'Send a message.',
-        expected: 'Message sent via HTTP POST to /chat/sendMessage.cfm. Messages poll via 3-second timer.',
+        expected: 'Message sent via HTTP POST to /chat/sendMessage.php. Messages poll via 3-second timer.',
         onFail: 'Note if message fails or gets lost.'
       },
       {
@@ -1030,7 +1030,7 @@ const sections = [
         preconditions: 'Navigated to Account from menu.',
         action: 'Observe Account screen.',
         expected: 'Nav title "Account". Loading spinner, then: Payout Status card, Activation card, Earnings card, Logout button. FAB in bottom-right.',
-        onFail: 'Screenshot. Check /workers/tierStatus.cfm response.'
+        onFail: 'Screenshot. Check /workers/tierStatus.php response.'
       },
       {
         id: 'AC02',
@@ -1085,7 +1085,7 @@ const sections = [
         title: 'Early unlock button',
         preconditions: 'Activation not complete.',
         action: 'Tap "Complete activation now (optional)".',
-        expected: 'API call to /workers/earlyUnlock.cfm. Opens URL in Safari. Reloads after return.',
+        expected: 'API call to /workers/earlyUnlock.php. Opens URL in Safari. Reloads after return.',
         onFail: 'Screenshot.'
       },
       {