How do I match Quill orders in my history other than by date? The order number provided by Quill in no way matches the reference numbers in my account history?

I only ask as sometimes I will place 2 orders on one day and I am trying to verify that we receive credit for all of them. All seem to be ok recently except one missing order, but just want to make sure.

Also - Quill states 3% on most items, however, recently it seems I am getting the 1% on basically everything - even orders that were 3% before. Have they changed their percentage? Or reduced it for their preferred members that are already receiving a product discount?