Hi Nik.
So little clues in your questions but....
You could manage different credit check point using Tx OVA8.
If a company code having problem checks in delivery order, sales order is created without credit check and in this case, usually, update setting of credit control area would be '000015' to update exposures from delivery orders.(SPRO > Enterprise Structure > Definition > Financial Accounting > Define Credit Control Area -> double click).
If my guess is true, that's a standard behaviour.