Budgetary Only Deptid

I am testing a department and have checked off the box for budgetary only. I have tested all of the modules and find that some don't allow this department to be processed, example - General Ledger Journals, Expenses and Requisitions. When I test this department in Billing, AR pending items and Accounts Payable (non PO transaction), the department is allowed to be processed but then stops in General Ledger when the journal is created. Does anyone know why this department is accepted in some modules and not others? Is this under configuration or would this be a bug? I believe