PO Header Values not being closed in Down Payment

Dear Experts,

We created a PO having 4 line items of 10,000 each and with a header condition (Eg. Air Freight) value 4000. Now the total value of PO is 40,000 (Gross) + 4,000 (Additional Charges) = 44,000.

When creating a down payment through F-48 with reference to PO, the user enters 11,000 for each line item. The below is the entry:

Vendor (Sp. GL B - PO Line Item 10)      11,000     DR

Vendor (Sp. GL B - PO Line Item 20)      11,000     DR

Vendor (Sp. GL B - PO Line Item 30)      11,000     DR

Vendor (Sp. GL B - PO Line Item 40)      11,000     DR

Bank Outgoing                                      44,000     CR

As we have down payment as a budgetable item in FM, the effect of the above entry is that PO is being reduced by 40,000 only instead of 44,000. This means that the extra budget of 4,000 is still appearing in Pending Commitments and complete 44,000 is appearing in Actuals.

Please advice on the appropriate solution.

Thanks,

Anss