diff --git a/artifacts/api-server/src/routes/services.ts b/artifacts/api-server/src/routes/services.ts
index a3ded34a..fd62ca32 100644
--- a/artifacts/api-server/src/routes/services.ts
+++ b/artifacts/api-server/src/routes/services.ts
@@ -87,34 +87,48 @@ router.patch("/services/reorder", requireAdmin, async (req, res): Promise<void>
   }
   const { orderedIds } = parsed.data;
 
+  // Validate the provided ids are unique and all reference real
+  // services. We intentionally do NOT require the client to send
+  // every service id — the iPad UI may filter or hide rows, and
+  // forcing a full snapshot caused false 400s ("orderedIds must
+  // contain every service id exactly once"). Any services that
+  // weren't included are pushed to the end of the list so they
+  // remain visible without colliding on sortOrder.
   const existing = await db
     .select({ id: servicesTable.id })
     .from(servicesTable);
   const existingIds = new Set(existing.map((s) => s.id));
 
-  if (orderedIds.length !== existingIds.size) {
-    res.status(400).json({
-      error: "orderedIds must contain every service id exactly once",
-    });
-    return;
-  }
   const seen = new Set<number>();
   for (const id of orderedIds) {
     if (!existingIds.has(id) || seen.has(id)) {
       res.status(400).json({
-        error: "orderedIds must contain every service id exactly once",
+        error: "orderedIds contains a duplicate or unknown service id",
       });
       return;
     }
     seen.add(id);
   }
 
+  const trailingIds = existing
+    .map((s) => s.id)
+    .filter((id) => !seen.has(id));
+
   await db.transaction(async (tx) => {
-    for (let i = 0; i < orderedIds.length; i++) {
+    let index = 0;
+    for (const id of orderedIds) {
       await tx
         .update(servicesTable)
-        .set({ sortOrder: i })
-        .where(eq(servicesTable.id, orderedIds[i]));
+        .set({ sortOrder: index })
+        .where(eq(servicesTable.id, id));
+      index += 1;
+    }
+    for (const id of trailingIds) {
+      await tx
+        .update(servicesTable)
+        .set({ sortOrder: index })
+        .where(eq(servicesTable.id, id));
+      index += 1;
     }
   });