I just got off the phone with Sage, and there is a big bug in Sage 2015 for those customers using Sage Payment Solutions. When an order is placed, and a deposit (not auth) is taken on the Sales Order, then only a portion of the order is invoiced, and the remaining order is deleted instead of refunding only the UNUSUED portion of the deposit, it is refunding 100% of the deposit. Here is an example:
Order # 123456
Line 1 $25
Line 2 $25
Line 3 $25
Line 4 $25
Deposit for $100 processed at time of order.
Invoice lines 1,2 and 3 for a total invoice of $75.
Customer does not want line 4
Delete sales order that is only showing line 4 for $25 (but note that deposit amount is still showing $100)
Prompt asking to void credit card transaction with a response of yes, expecting it to refund the $25
VOIDS ENTIRE DEPOSIT OF $100!!