it's not normal, try a different dealer or else go back and ask them to A. show you other Jeeps where this is normal, B. A tech service bulletin that indicates this is normal and if they still won't cover it under warranty, contact Chrysler direct.
If that doesn't get it done, contact your local media about it, dealerships hate bad media - I think all markets have a local media person that deals with issues, they love this stuff especially since Chevrolet is under such fire, I think they will be looking for anything to go after that may be a safety issue...