diff --git a/application/controllers/jobs/AntragJob.php b/application/controllers/jobs/AntragJob.php
index 6d4617a73..0571bd9dd 100644
--- a/application/controllers/jobs/AntragJob.php
+++ b/application/controllers/jobs/AntragJob.php
@@ -373,9 +373,10 @@ class AntragJob extends JOB_Controller
 				$result = $this->prestudentlib->setAbbrecher(
                     $antrag->prestudent_id,
                     $antrag->studiensemester_kurzbz,
-                    $antrag->insertvon ?: $insertvon,
+                    'AntragJob',
                     'abbrecherStgl',
-                    $antrag->insertamum
+                    $antrag->insertamum,
+                    $antrag->insertvon ?: $insertvon
                 );
 				if (isError($result))
 					$this->logError(getError($result));
diff --git a/application/libraries/PrestudentLib.php b/application/libraries/PrestudentLib.php
index 279b6ed2a..989e14585 100644
--- a/application/libraries/PrestudentLib.php
+++ b/application/libraries/PrestudentLib.php
@@ -35,10 +35,12 @@ class PrestudentLib
 		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
 	}
 
-	public function setAbbrecher($prestudent_id, $studiensemester_kurzbz, $insertvon = null, $statusgrund_kurzbz = null, $datum = null, $bestaetigtam = null)
+	public function setAbbrecher($prestudent_id, $studiensemester_kurzbz, $insertvon = null, $statusgrund_kurzbz = null, $datum = null, $bestaetigtam = null, $bestaetigtvon = null)
 	{
 		if (!$insertvon)
 			$insertvon = getAuthUID();
+		if (!$bestaetigtvon)
+			$bestaetigtvon = $insertvon;
 
 		$result = $this->_ci->PrestudentstatusModel->getLastStatus($prestudent_id, $studiensemester_kurzbz);
 		if (isError($result))
@@ -79,7 +81,7 @@ class PrestudentLib
 			'insertamum' => date('c'),
 			'orgform_kurzbz'=> $prestudent_status->orgform_kurzbz,
 			'studienplan_id'=> $prestudent_status->studienplan_id,
-			'bestaetigtvon' => $insertvon,
+			'bestaetigtvon' => $bestaetigtvon,
 			'bestaetigtam' => $bestaetigtam
 		]);
 
diff --git a/application/models/education/Pruefung_model.php b/application/models/education/Pruefung_model.php
index ef7cfc967..e1d668293 100644
--- a/application/models/education/Pruefung_model.php
+++ b/application/models/education/Pruefung_model.php
@@ -222,9 +222,9 @@ class Pruefung_model extends DB_Model
 		$this->withDetailsForStudierendenAntrag();
 
 		if ($maxDate)
-			$this->db->where("p.datum < ", $maxDate->format('c'));
+			$this->db->where("p.datum <= ", $maxDate->format('Y-m-d'));
 		if ($minDate)
-			$this->db->where("p.datum > ", $minDate->format('c'));
+			$this->db->where("p.datum > ", $minDate->format('Y-m-d'));
 
 		$this->db->where("b.aktiv", true);