diff --git a/packages/spec-dashboard/src/apis.test.ts b/packages/spec-dashboard/src/apis.test.ts
index 1c3c799ae5b..ed07f3ed7fb 100644
--- a/packages/spec-dashboard/src/apis.test.ts
+++ b/packages/spec-dashboard/src/apis.test.ts
@@ -286,4 +286,70 @@ describe("splitManifestByTables", () => {
     const dataPlaneTable = result.find((r) => r.tableName === "Data Plane Table");
     expect(dataPlaneTable!.emitterNames).toEqual(["@azure-tools/typespec-csharp"]);
   });
+
+  it("should preserve order of tableDefinitions in the result", () => {
+    const manifest = createManifest("test-package", "Display Name", [
+      "prefix1_scenario1",
+      "prefix2_scenario1",
+      "prefix3_scenario1",
+    ]);
+    const tables: TableDefinition[] = [
+      {
+        name: "Third Table",
+        packageName: "test-package",
+        prefixes: ["prefix3_"],
+      },
+      {
+        name: "First Table",
+        packageName: "test-package",
+        prefixes: ["prefix1_"],
+      },
+      {
+        name: "Second Table",
+        packageName: "test-package",
+        prefixes: ["prefix2_"],
+      },
+    ];
+
+    const result = splitManifestByTables(manifest, tables);
+
+    expect(result).toHaveLength(3);
+    // Results should be in the same order as tableDefinitions
+    expect(result[0].tableName).toBe("Third Table");
+    expect(result[1].tableName).toBe("First Table");
+    expect(result[2].tableName).toBe("Second Table");
+  });
+
+  it("should preserve order when mixing tables with prefixes and catch-all tables", () => {
+    const manifest = createManifest("test-package", "Display Name", [
+      "prefix1_scenario1",
+      "prefix2_scenario1",
+      "other_scenario",
+    ]);
+    const tables: TableDefinition[] = [
+      {
+        name: "Second Table (Prefix2)",
+        packageName: "test-package",
+        prefixes: ["prefix2_"],
+      },
+      {
+        name: "First Table (Catch-All)",
+        packageName: "test-package",
+        // No prefixes - catch-all table
+      },
+      {
+        name: "Third Table (Prefix1)",
+        packageName: "test-package",
+        prefixes: ["prefix1_"],
+      },
+    ];
+
+    const result = splitManifestByTables(manifest, tables);
+
+    expect(result).toHaveLength(3);
+    // Results should be in the same order as tableDefinitions, not grouped by type
+    expect(result[0].tableName).toBe("Second Table (Prefix2)");
+    expect(result[1].tableName).toBe("First Table (Catch-All)");
+    expect(result[2].tableName).toBe("Third Table (Prefix1)");
+  });
 });
diff --git a/packages/spec-dashboard/src/apis.ts b/packages/spec-dashboard/src/apis.ts
index 9f8ced79cc9..d367352ef59 100644
--- a/packages/spec-dashboard/src/apis.ts
+++ b/packages/spec-dashboard/src/apis.ts
@@ -88,49 +88,46 @@ export function splitManifestByTables(
     [];
   const usedScenarios = new Set<string>();
 
-  // Separate tables with prefixes from catch-all tables (no prefixes)
-  const tablesWithPrefixes = applicableTables.filter((t) => t.prefixes && t.prefixes.length > 0);
-  const catchAllTables = applicableTables.filter((t) => !t.prefixes || t.prefixes.length === 0);
-
-  // Process tables with prefixes first
-  for (const table of tablesWithPrefixes) {
-    // Filter scenarios by prefixes
-    const filteredScenarios = manifest.scenarios.filter((s: ScenarioData) => {
-      if (usedScenarios.has(s.name)) {
-        return false; // Already assigned to another table
+  // First, identify which scenarios would match ANY prefix table (to reserve them from catch-all tables)
+  const scenariosMatchingAnyPrefix = new Set<string>();
+  for (const table of applicableTables) {
+    if (table.prefixes && table.prefixes.length > 0) {
+      for (const scenario of manifest.scenarios) {
+        if (matchesPrefixes(scenario.name, table.prefixes)) {
+          scenariosMatchingAnyPrefix.add(scenario.name);
+        }
       }
-      return matchesPrefixes(s.name, table.prefixes!);
-    });
+    }
+  }
 
-    if (filteredScenarios.length > 0) {
-      // Mark these scenarios as used
-      filteredScenarios.forEach((s) => usedScenarios.add(s.name));
+  // Now process tables in the order they appear in tableDefinitions
+  for (const table of applicableTables) {
+    const isCatchAll = !table.prefixes || table.prefixes.length === 0;
 
-      result.push({
-        manifest: {
-          ...manifest,
-          scenarios: filteredScenarios,
-        },
-        tableName: table.name,
-        emitterNames: table.emitterNames,
+    let matchingScenarios: ScenarioData[];
+    if (isCatchAll) {
+      // Catch-all table: only get scenarios not yet assigned AND not matching any prefix
+      matchingScenarios = manifest.scenarios.filter(
+        (s: ScenarioData) => !usedScenarios.has(s.name) && !scenariosMatchingAnyPrefix.has(s.name),
+      );
+    } else {
+      // Table with prefixes: filter scenarios by prefixes
+      matchingScenarios = manifest.scenarios.filter((s: ScenarioData) => {
+        if (usedScenarios.has(s.name)) {
+          return false; // Already assigned to another table
+        }
+        return matchesPrefixes(s.name, table.prefixes!);
       });
     }
-  }
-
-  // Process catch-all tables - they only get scenarios not yet assigned
-  for (const table of catchAllTables) {
-    const remainingScenarios = manifest.scenarios.filter(
-      (s: ScenarioData) => !usedScenarios.has(s.name),
-    );
 
-    if (remainingScenarios.length > 0) {
+    if (matchingScenarios.length > 0) {
       // Mark these scenarios as used
-      remainingScenarios.forEach((s) => usedScenarios.add(s.name));
+      matchingScenarios.forEach((s) => usedScenarios.add(s.name));
 
       result.push({
         manifest: {
           ...manifest,
-          scenarios: remainingScenarios,
+          scenarios: matchingScenarios,
         },
         tableName: table.name,
         emitterNames: table.emitterNames,