My hatch also has the same problem; hangs over the taillights on the passenger side by 1/2 inch. I think it's because that's the side the car was hit on. (It was totalled, and then repaired by a body shop, and then they sold it to me.) I'm not letting it bother me; if someone notices it, that means they're too damn close to my car, and they better back the hell up before I get to them!

When I did my bodywork to the whole car (5 years ago), I re-did that area, and sure enough, the paint under my paint was red, and the paint inside the rear wheelwell (under the undercoating) was red. The panel behind the taillights was red. Apparently, a red Firebird donated it's quarter section to my car.