In qB Pro it sorts invoices by number and then any letter appended to the end.  Example. 

001

001 A

001 B

002

003

003 A

004

QB Online seems to sort by the invoices with a letter first and then sorting the remainder.  Example

001 A

001 B

003 A

001

002

003

004

Is there a way to change QBOL to sort like QB Pro.  Or Do I need to change the way I number invoices?