unable to receive item directly added to a purchase order

All - I have below issue. Please help

1. Business User A created a requisition of 100,000 AED and this was converted into a PO for 100,000 AED

2. Now, there is a variation of 12,000 AED to this purchase order and buyer directly added a new line for 12,000 AED to the purchase order and approved.

3. Now end user wants to receive both lines for 1,12,000. But, he only sees 1st line of 100,000 AED and unable to see the 2nd line which was added directly to a PO and was not converted from requisition into the PO.

Please advise why this is so ?

Thanks, Vishal.