returned item shows as received on PO

I have a PO with returned item still showing as received.

15 ordered, 20 originally received, 5 returned, 15 invoiced

The PO shows the goods receipts for the 20 and (5), GLs are debited and credited as expected and inventory is correct.  However, the PO still says 20 were received instead of 15 and the item is included in the Purchases Clearing report.  

Have you ever experienced this?

Rebuilding sort files didn't help.