Discount not applied properly

I have a user in accounting indicating that a discount on a voucher was not applied properly on the distribution lines. The voucher has 5 lines, and a 1% discount was applied based on the total amount - not based on the amount of each individual line (which were tied to individual business units). She indicated they should reflect how the expense entries were made when the invoice was keyed (which were all different amounts for each business unit).

Ex. Say a Voucher Total is $1,500. The discount is applied as $15 for each of the five lines. When the invoice was keyed the lines were at different amounts for each business unit, so each line should not have a $15 discount amount - they should be different.