Anybody have any ideas here? AA wouldn't let me change my flight to rebook at a lower cost - no idea why - so I canceled it and am now trying to pay, but there's no option to use a flight or trip credit. Any ideas as to why I'm seeing this?

Update: I think I may have figured it out. I can't use a flight credit for an international flight originating from outside the US despite that being the flight canceled for which I was issued a flight credit?