diff --git a/back/database/index.js b/back/database/index.js
index 4df4346..67b90b0 100644
--- a/back/database/index.js
+++ b/back/database/index.js
@@ -944,8 +944,12 @@ async function getPastBusArrival(routeId, stationId, staOrder, date, onlySevenDa
 
             if (busArrivalList && busArrivalList.length > 0) {
                 const mappedData = applySpecialRouteMapping(busArrivalList, stationId, routeId);
-                cache[cacheKey] = mappedData;
-                allResults = allResults.concat(mappedData);
+                const dataWithOffset = mappedData.map(item => ({
+                    ...item,
+                    daysAgo: Math.abs(dayOffset)
+                }));
+                cache[cacheKey] = dataWithOffset;
+                allResults = allResults.concat(dataWithOffset);
             }
         }
 
diff --git a/front/lib/station_bus_info_page.dart b/front/lib/station_bus_info_page.dart
index c7e13e3..8fdbeae 100644
--- a/front/lib/station_bus_info_page.dart
+++ b/front/lib/station_bus_info_page.dart
@@ -38,7 +38,7 @@ class _StationBusInfoPageState extends State<StationBusInfoPage> {
   void initState() {
     super.initState();
     fetchBusData();
-    _timer = Timer.periodic(const Duration(seconds: 15), (timer) {
+    _timer = Timer.periodic(const Duration(seconds: 30), (timer) {
       fetchBusData();
     });
   }
diff --git a/front/lib/station_bus_list_page.dart b/front/lib/station_bus_list_page.dart
index 89fa258..8edd9d1 100644
--- a/front/lib/station_bus_list_page.dart
+++ b/front/lib/station_bus_list_page.dart
@@ -149,7 +149,7 @@ class _StationBusListPageState extends State<StationBusListPage> {
           const Divider(height: 1),
           Expanded(
             child: ListView.separated(
-              //controller: _scrollController,
+              controller: _scrollController,
               padding: EdgeInsets.zero,
               itemCount: timeBasedData.length,
               separatorBuilder: (context, index) => const Divider(height: 1),