accounting issue with late charge interest invoice in multiple BSV scenario

Hi,
I have multiple BSVs within single operating unit. For late charge calculation I am using interest invoices to be generated. The issue is BSV in the interest invoice is getting picked up based on transaction type and not based on auto accounting setup which points to customer site.

Due to this accounting is not happening correctly. I had raised this issue with support and given below is the reply.

" Where Late Charges are implemented as debit memos or interest invoices,
additional accounting information will be required to create these
transactions (i.e. Activity Types will not have sufficient accounting