Powdercoated (Formerly Chrome) Fuel Door Issue

[Humdingah]

I have a factory chrome fuel door that I recently had powdercoated and now I have an odd issue with it...it won't stay shut. The door opens and closes fine but it won't stay closed...it's open like 1/2". I didn't see any way to 'adjust' the hinge and I didn't see anything odd when I got it back from the powdercoater so I was wondering if anyone had seen this issue before and, if so, what was the fix?

It's way too pretty to not close so hopefully someone knows a 'fix' outside of rubber bands or duct tape.