Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rfacca88de0d4c72d943b59bad9264a9b0a031ae5 -r949b386b5f58ab8bc534bd7e913ecb9f2c084c17
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision facca88de0d4c72d943b59bad9264a9b0a031ae5)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 949b386b5f58ab8bc534bd7e913ecb9f2c084c17)
@@ -135,9 +135,6 @@
     resetBloodPumpRotorCount();
     resetDialInPumpRotorCount();
 
-    doorClosedRequired( FALSE, FALSE );
-    syringeDetectionRequired( FALSE );
-
     // Set user alarm recovery actions allowed in this mode
     setAlarmUserActionEnabled( ALARM_USER_ACTION_RESUME, FALSE );
     setAlarmUserActionEnabled( ALARM_USER_ACTION_RINSEBACK, FALSE );
@@ -159,8 +156,15 @@
     // If we just exited Post Treatment Mode, goto disinfect sub state.
     if ( MODE_POST == previousOpMode )
     {
+        doorClosedRequired( FALSE, FALSE );             // door no longer required to be closed in standby mode
         currentStandbyState = STANDBY_WAIT_FOR_DISINFECT_STATE;
     }
+    else
+    {
+        doorClosedRequired( TRUE, FALSE );
+    }
+    syringeDetectionRequired( FALSE );
+
     // Request DG service record and usage information from DG
     sendDGServiceRequestToDG();
     sendDGUsageInfoRequestToDG();
@@ -647,16 +651,12 @@
                 {
                     syringePumpVerifyForceSensorDACCalibration();
                     homingInitiated = FALSE;                        // reset for next time
+                    doorClosedRequired( FALSE, FALSE );             // door no longer required to be closed in standby mode
                     state = STANDBY_WAIT_FOR_TREATMENT_STATE;       // Go to wait for treatment state after above check
                 }
             }
         }
     }
-    else
-    {
-        // Trigger door open alarm to prompt user to close the door
-        activateAlarmNoData( ALARM_ID_CARTRIDGE_DOOR_OPENED );
-    }
 
     return state;
 }
Index: firmware/App/Services/AlarmMgmt.c
===================================================================
diff -u -ra57994f752662abc0aaa8c2cf5c3af47ec2c5a20 -r949b386b5f58ab8bc534bd7e913ecb9f2c084c17
--- firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision a57994f752662abc0aaa8c2cf5c3af47ec2c5a20)
+++ firmware/App/Services/AlarmMgmt.c	(.../AlarmMgmt.c)	(revision 949b386b5f58ab8bc534bd7e913ecb9f2c084c17)
@@ -411,13 +411,7 @@
                 broadcastData( MSG_ID_ALARM_CLEARED, COMM_BUFFER_OUT_CAN_HD_ALARM, (U08*)&data, sizeof( ALARM_ID_DATA_PUBLISH_T ) );
                 alarmIsActive[ alarm ] = FALSE;
                 clearAlarmCondition( alarm );
-
                 alarmStartedAt[ alarm ].data = 0;
-                // Clear FIFO if this alarm was in it
-                if ( alarmPriorityFIFO[ ALARM_TABLE[ alarm ].alarmPriority ].alarmID == alarm )
-                {
-                    resetAlarmPriorityFIFO( ALARM_TABLE[ alarm ].alarmPriority );
-                }
             }
         }
     }
@@ -685,11 +679,13 @@
     U32 index;
     U32 activeAlarmListIndex = 0;
 
+    // Blank alarm list initially
     for ( index = 0; index < MAX_ALARM_LIST_SIZE; index++ )
     {
         activeAlarmList[ index ] = ALARM_ID_NO_ALARM;
     }
 
+    // Fill alarm list from (up to) 10 highest priority active alarms
     if ( TRUE == isAnyAlarmActive() )
     {
         for ( index = 0; index < NUM_OF_ALARM_IDS; index++ )
@@ -799,11 +795,17 @@
  *************************************************************************/
 static void updateAlarmsState( void )
 {
-    ALARM_PRIORITY_T highestPriority = ALARM_PRIORITY_NONE;
+    ALARM_PRIORITY_T highestPriority = ALARM_PRIORITY_NONE, p;
     ALARM_ID_T a;
     BOOL faultsActive = FALSE;
     BOOL dialysateRecircBlocked = FALSE;
     BOOL bloodRecircBlocked = FALSE;
+
+    // Reset priority FIFOs so we can re-determine them below
+    for ( p = ALARM_PRIORITY_NONE; p < NUM_OF_ALARM_PRIORITIES; p++ )
+    {
+        resetAlarmPriorityFIFO( p );
+    }
 
     // Update FIFOs and sub-ranks per active alarms table - for alarm ranking purposes to determine "top" alarm
     for ( a = ALARM_ID_NO_ALARM; a < NUM_OF_ALARM_IDS; a++ )
@@ -814,7 +816,7 @@
             U32 subRank = ALARM_TABLE[ a ].alarmSubRank;
             U32 msSinceTriggered = calcTimeSince( getAlarmStartTime( a ) );
 
-            // See if this alarm is higher rank than highest active alarm in this priority category so far
+            // See if this alarm is higher rank than highest active alarm in this priority category so far (lower rank # = higher rank)
             if ( subRank <= alarmPriorityFIFO[ almPriority ].subRank )
             {
                 // If sub-rank is a tie, see which alarm was triggered first