AutoPost Journal Entries by Currency

Is there a way for AutoPost to post first the functional currency before the foreign?

We have a custom code/program to:

1) automatically generate transactions with multiple currencies having the same source and categories.

2) execute mass allocation that will also auto generate multiple transactions with same source and categories

3) Call AutoPost to post first #1 then #2.

Now, were having balance corruption issue with Retained Earnings Account for item #1 when all of the currencies are posted at the same time. If transactions in functional currency is not posted together with foreign currency, REA balances are updated correctly.

The solution that we have right now is to do the whole step above first for functional currency then do the same steps again for the foreign currency.