diff --git a/api/v3/TwingleEvent/Sync.php b/api/v3/TwingleEvent/Sync.php
index 1b163c6..55c3e57 100644
--- a/api/v3/TwingleEvent/Sync.php
+++ b/api/v3/TwingleEvent/Sync.php
@@ -111,7 +111,7 @@ function civicrm_api3_twingle_event_Sync(array $params): array {
     Civi::cache('long')->set('twinglecampaign_twingle_api', $twingleApi);
   }
 
-  // If an id or a project_id is given, synchronize only this one campaign
+  // If an id or a event_id is provided, synchronize only this one campaign
   if ($params['id'] || $params['event_id']) {
 
     // Get project from db via API
@@ -166,7 +166,7 @@ function civicrm_api3_twingle_event_Sync(array $params): array {
     }
   }
 
-  // If no id but an event_id and/or a project_id is given, synchronize all
+  // If no id but an event_id and/or a project_id is provided, synchronize all
   // all events or just the events of the given project
 
   $result_values = [];
@@ -285,7 +285,7 @@ function civicrm_api3_twingle_event_Sync(array $params): array {
     }
   }
 
-  // Give back results
+  // Return results
   if ($errors_occurred > 0) {
     $errorMessage = ($errors_occurred > 1)
       ? "$errors_occurred synchronisation processes resulted with an error"
diff --git a/api/v3/TwingleProject/Sync.php b/api/v3/TwingleProject/Sync.php
index d078169..b313684 100644
--- a/api/v3/TwingleProject/Sync.php
+++ b/api/v3/TwingleProject/Sync.php
@@ -184,7 +184,7 @@ function civicrm_api3_twingle_project_Sync(array $params): array {
         // instantiate project with values from TwingleProject.Get
         $project = new TwingleProject($project_from_civicrm, $id);
         // push project to Twingle
-        $result = pushToTwingle($project, $twingleApi, $params);
+        $result = _pushProjectToTwingle($project, $twingleApi, $params);
         if ($result['is_error'] != 0) {
           $errors_occurred++;
           $result_values[$project->getId()] =
@@ -451,7 +451,7 @@ function _projectSync(TwingleProject $project,
 
   // If both versions are still synchronized
   else {
-    $response[] = $project->getResponse('TwingleProject up to date');
+    $response = $project->getResponse('TwingleProject up to date');
     return civicrm_api3_create_success(
       $response,
       $params,
diff --git a/api/v3/TwingleSync/Sync.php b/api/v3/TwingleSync/Sync.php
index 2f12e3e..5c6340d 100644
--- a/api/v3/TwingleSync/Sync.php
+++ b/api/v3/TwingleSync/Sync.php
@@ -67,18 +67,23 @@ function civicrm_api3_twingle_sync_Sync(array $params): array {
 
   // Synchronize all TwingleEvent campaigns
   foreach ($projects as $project) {
-    if (is_array($project)) {
+    // If the project is of type 'event', synchronize all its events
+    if (is_array($project) && $project['project_type'] == 'event') {
       $_params = $params;
       $_params['project_id'] = $project['project_id'];
+      $events = civicrm_api3(
+        'TwingleEvent',
+        'sync',
+        $_params
+      )['values'];
       $result_values[] = [
         'project' => $project,
-        'events'  => array_values(
-          civicrm_api3(
-            'TwingleEvent',
-            'sync',
-            $_params
-          )['values']
-        ),
+        'events'  => array_values($events),
+      ];
+    }
+    else {
+      $result_values[] = [
+        'project' => $project
       ];
     }
   }