Multiple Deductions for single invoice

We have customers that split out invoice deductions by reason code. This results in multiple deductions for a single invoice. When applying the cash these deductions are lumped into a single claim and no reference to reason codes is available in TM. 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.