Multi Period Accounting error

Hello,

I am getting problem in processing Multi Period PO matched AP Invoice. Following is the description on the problem:

1) I create an AP invoice and match the same to PO.

2) There is a Invoice Price Variance in the invoice distributions.

3) The accounting is done correctly for all the periods except for the last accounting period wherein the balance in the Prepaid Expense account should be zero.

4) The Journal Line Type (JLT) which gets executed is having Multi period option as 'Recognition'. Hence I am not able to modify the JLT conditions.

5) The SLA application for Payables is a customised one.