Multiple Deductions for Single Invoice

We process payments using Oracle Lockbox. We are integrated with Trade Management and use to create claims resulting from over or underpayments in the lockbox. We have customers that send us multiple remittance lines for the same invoice. For each deduction on a line they are supplying unique reason codes for the deduction. Today all deduction lines are combined into a single TM claim and none of the reason codes are referenced. We are hoping to find a way to have individual claims created and retain the reason code sent in by the customer.

Does anyone else have scenarios like this? If so - how do you manage these? We would ideally like to have claims group by reason code and not invoice number but have not found that this is possible yet.