I have v9 and Ive entered POs and confirmed them and received the products, because i know that this one specific PO has a product that its the only one ive ever bought and it appears in inventory, so I know that PO has been set to Receive Products.  But why when I go back to the PO I see the option of Receive Products still?

Its confusing because right now I was about to click the button to receive because i thought it was pending, but i decided to check inventory and thats how i discovered it has already been received.