Control account Issue - BP

Hi Friends,

The client has two control accounts for Accounts Payable

1- 2101 - Accounts Payable USD

2- 2102 - Accounts Payable Trade Foreign ( Multi Currency)

One of the BP has control account for Accounts Payable set to 2102

Whenever a posting is made its going to 2101 instead ( Currency is in USD)

Question:

- What could be the reason for above?

-How to clear the balance in 2101 ?

Thanks