Issue with paid status for expenses on partially paid invoices

The Expense Report allows you to run a report showing unpaid expenses if you choose "unpaid" in the "paid status" box.  However, an invoice that is partially paid shows all expenses as unpaid even if a client has paid enough of the invoice to cover all of the expenses.  I have to manually look at the payments applied to each invoice compared to the expense total for each invoice for every client who has partially paid invoices when I run an expense report for an attorney.  This process takes me a few hours for each attorney.  I have asked about this issue a few times over the past 8 years, but I have been told that there is not a way to show expenses on partially paid invoices as paid.  I would love to have this issue worked on so I can run an accurate report of unpaid expenses without having to make manual adjustments.