By the sound of it they don't think it's a big problem. Who did you buy the quarter through? What's their return policy? If you're not happy with it, send it back.
And can you post a picture of the quarter so we can see what you're talking about? AMD consistently makes the most accurate reproduction sheetmetal for these cars, but they don't always get it right. If you post up a picture of what you've got, maybe other folks can chime in and say if theirs are the same. Ie, is this a problem with the entire stamping run, or just a single bad part (it happens).
