R12.1.3: Supplier Paid Invoice History report does not pick up credit memos

Tonight's post comes from the MOS document "APXINVPH Is Not Picking Up Credit Memos" found in note ID 1959162.1 which can be read several ways: first, maybe the report is not designed to pull these lines (a credit memo is not a paid invoice right?); secondly, why do you have to put a seemingly random negative amount in the parameters to get these credit memos to appear?  Since there is a bug attached, I believe this will be fixed going forward but I would love to hear from the rest of you about this and get your take on it.