Discount on Credits

Hello,

My client creates/interface voucher for credits as regular voucher with negative amount representing the credit. Its working fine and have no issue. However we have this scenario where a voucher was created initially with a discount and paid. This vendor gave us credit for the whole voucher to be applied against future invoices. The credit does reflect amount plus discount that was on the original voucher. It looks like PeopleSoft is not taking the discount against a credit. Is this the way system is designed or is a bug? Here is the example. I would have expected the system to