pop receipt is duplicated

POP receipt is duplicated in GP 2010 SP2 ,windows 2008 server r2 64 Bit, sql server 2008 r2 , all Inquiry screens are showing exactly 2 same records for each receipt.

All these receipts are done through PO receiving without PO NO third party customization is there

I have checked POP tables nothing is duplicated there but it is duplicated in IV tables . Inventory is really badly  affected by this

Any help