Accrual Account Generated is Not Correct

Hi

Our GL chart of account structure is as follows;
-Entity
-Cost Centre
-Account
-Product
-Intercompany
-Spare

The issue is when we rasie requisition we put the chart accounts against different cost centres and different entities. Therefore the accrual account is generated for Each cost centre and each entity combinations. What we expect to happen is to create the accrual account against the balancing segment and leave the cost center unspecified.

Ideally the cost centre should default from the purchasing options?, accrual account and the balancing segment for the accrual account should come from the charge account.

Thanks and Regards,