Update 9 Patch 8

Anyone know why WIP inquiry for a Product record includes purchase orders that have been invoiced and closed for back to back orders that have been delivered, invoiced and closed. 

How do I change this, or what am I misunderstanding?

I note that we don't receive the purchase order where back to back because goods go straight from supplier to customer.

If X3 needs us to receipt the PO, is there a quick best practice for back to back purchase orders, or does it require the same receipt process as stock order?