Payables Reconcile to GL Error for voided transactions

Dynamics GP 2015 R2 (14.00.0952).  The spreadsheet generated by "reconcile to GL" is producing confusing results when I:

1)Make an entry in Payables->Transaction entry, where the invoice is entered and paid (with cash in my case) in the same window.

2)Void the payment from Payables->Void historical transactions

3)Void the invoice from Payables->Void open transactions.

Here's what the spreadsheet looks like after that:  (DUMMY is the invoice number.)

The two unmatched transactions on the payables side are what's confusing me.  I understand why those might appear in payables and not in GL, because the original transaction never touched the payables GL account.

Perhaps the problem is that one of those unmatched transactions should be positive instead of negative?  Maybe this is a bug in the reconcile to GL module?

Thanks in advance for any explanations.

Lee