I have noticed that my QC report seems to be overstated.  The QC report I ran at month end June showed 4 parts in QC, which is accurate, now the QC report shows 425 which was the original quanity, of which 421 have been received into inventory and paid through AP.  I have found that this has happened on a few PO's, all of which are still open. Any thoughts?? Thanks.

If I understand correctly from your 1st post, these are "blanket" type PO's that you receive against and pay against, but they stay open for long periods of time until ALL items are finally received and paid. Is that correct?