Further error proofing

assets/js/cat.js

@@ -745,6 +745,12 @@ $(document).ready(function() {
             }
         }
 
+        // Validate that we have frequency data before proceeding
+        if (!data.frequency || data.frequency == 0 || data.frequency == null) {
+            console.warn('CAT: No valid frequency data received');
+            return;
+        }
+
         // Force update by clearing catValue (prevents cat2UI from blocking updates)
         $frequency.removeData('catValue');
         cat_updating_frequency = true; // Set flag before CAT update

assets/js/sections/bandmap_list.js

@@ -1698,9 +1698,11 @@ $(function() {
 					if (cachedSpot && cachedSpot.band) {
 						shouldDecrementTTL = (cachedSpot.band === bandForAPI);
 					}
-				}					if (shouldDecrementTTL) {
-						newTTL = ttl - 1;  // Decrement only if in scope of this fetch
-					}
+				}
+
+				if (shouldDecrementTTL) {
+					newTTL = ttl - 1;  // Decrement only if in scope of this fetch
+				}
 
 					if (newSpotKeys.has(key)) {
 						newTTL = 1;  // Reset to 1 if spot still exists (keeps it valid)