diff --git a/admin/systemsortprocess.php b/admin/systemsortprocess.php
index ac79a429..f043c104 100644
--- a/admin/systemsortprocess.php
+++ b/admin/systemsortprocess.php
@@ -257,7 +257,7 @@ while (!is_process_killed($process_id)) //check if process killed every $sleepin
   		AND ((apn.appointment_id IS NOT NULL) or qs.call_max = 0 or ((SELECT count(*) FROM `call` WHERE case_id = c.case_id) < qs.call_max))
     	AND (SELECT count(*) FROM `questionnaire_sample_quota` WHERE questionnaire_id = c.questionnaire_id AND sample_import_id = s.import_id AND quota_reached = 1) = 0
   		GROUP BY c.case_id
-  		ORDER BY IF(ISNULL(apn.end),1,0),apn.end ASC, a.start ASC, qsep.priority DESC";
+  		ORDER BY IF(ISNULL(apn.end),1,0),apn.end ASC, qsep.priority DESC, a.start ASC";
     
   	$rs = $db->GetAll($sql);
 
diff --git a/functions/functions.operator.php b/functions/functions.operator.php
index 0d7226dd..d7a31d47 100644
--- a/functions/functions.operator.php
+++ b/functions/functions.operator.php
@@ -638,7 +638,7 @@ function get_case_id($operator_id, $create = false)
 					AND ((apn.appointment_id IS NOT NULL) or qs.call_max = 0 or ((SELECT count(*) FROM `call` WHERE case_id = c.case_id) < qs.call_max))
 					AND (apn.require_operator_id IS NULL OR apn.require_operator_id = '$operator_id')
 					AND (SELECT count(*) FROM `questionnaire_sample_quota` WHERE questionnaire_id = c.questionnaire_id AND sample_import_id = s.import_id AND quota_reached = 1) = 0
-					ORDER BY IF(ISNULL(apn.end),1,0),apn.end ASC, a.start ASC, qsep.priority DESC
+					ORDER BY IF(ISNULL(apn.end),1,0),apn.end ASC, qsep.priority DESC, a.start ASC
 					LIMIT 1";
 
  				//apn.appointment_id contains the id of an appointment if we are calling on an appointment