Hi Jajah,
The POitem element is showing the open POs linked to your material.
If your material has an open PO with an outbound delivery linked (without PGI), then, the MD04 transaction will display the open PO, and, the outbound delivery assigned to the "Delvry" element.
The reason why the POitem element is showing 6K is because your material has open PO(s) for 6K.
You will see the outbound deliveries with another element "Delvry".
Please, let me know if you need any further information.
Cheers,
SP