Is charge account on Internal Requisition (single OU) not used?

I am testing the IR/ISO process in 11.5.10 for a client in a single OU scenario. Finished Good items are made in one IO and shipped to other IOs for consumption. In the supplying org, the items are set up as costed items, but in the receiving org the items are expensed on receipt.

I have set up a non quantity tracked expense subinventory in the receiving org for receipt of internally ordered items.  When the items are shipped through ISO and received at the receiving org, it is found that the expense account on the subinventory setup is charged, and not the charge account on the requisition. The charge account on the requisition is not hit at all.  Since different items are to be expensed to different accounts, charging it to the subinventory account is not acceptable.