Purchasing catagory Buyer vs Supplier catalog Buyer

Hi,

Perhaps someone would have views on the following:

I have a number of POs stuck at In Process Status (Release 12.04)

On investigation, consistent theme is as follows: 

The item being purchased is assigned to a purchasing category which is assigned to a Buyer (Buyer 1)

The item is requistioned via Catalog. The item is part of a Supplier catalog which is assigned a different Buyer (Buyer 2)

I believe that the Order is stuck at In process is because the system is confused and doesn't know which Buyer is responsible for the item

The In Process status is assigned to a different employee who is top of the approvals hierarchy above Buyer 1 and Buyer 2