Propogated Cost Adjustment Leaves Balance in Receipt Accounting

Summary:

Received an PO and matched an invoice to the receipt for $1000. We then returned the receipt to supplier, and matched a Credit Memo for $400 (via correct matched invoice). The credit match created a IPV, which propagated through the transaction, however it does not appear to have propagated to the return to supplier on the Receipt Accounting side - it is leaving a balance in the Receiving Inspection, where I would have assumed it would have propagated down through this return on supplier in receipt accounting and left a $600 balance in Accrual, not Receiving Inspection.
Are we missing something that causes this balance in the wrong area?