Using DC 9.2A (150916)

We've been having minor data integrity errors over the last few months related to open sub-ledgers. This one below relates to an unposted AP batch with an invoice that has only been partially entered as it's a long one that was not completed before the DIC. The error that appears is:

Checking non-posted applied payments ... ... Checked OK
Vendor VISADT open batch invoice computed total 9,973.24 does not match stored total 11,336.65
Checking Open Batch Vendor Totals ... ... 1 error(s) found

I'm not sure where it's getting the "stored" total to compare it with because the current total is 9973.24? Does it perhaps keep a temp total to do a comparison?

The error disappears once the AP batch is posted but I'm curious as to why it is checking non-posted sub-ledgers.

Karin