Change fee paid with old money!!!
Haven't seen any reports of this, and a search turned up nada.
Just changed a flight with an agent (round trip changed to one way, so needed to call).
Original ticket about $740. New ticket about $450. Received an E-Cert for about $90. The agent specifically said that the change fee would be taken from the credit...I repeated that back to him and he confirmed it. Finally!!!!