RE: Convertible top adjustment
You MIGHT be able to improve the situation with an adjustment of the cams on each side. Changing these can cause the top to get slightly "longer" toward the front of the car. You need a torx screwdriver to remove the set screws and turn the cams. There's a little "dart" on the cam. Pointing the dart more toward the front pulls the top header back, and vice versa.
The problem is that fooling around with this has other effects, and the whole thing is inter-related. You might help the problem up front but screw up the sealingat the quarter windows, because you will be changing the angle there.
Personally, I'd contact a shop that specializes in convertible tops. They are likely to do a much better job than a dealer, as the dealer's mechanics rarely, if ever deal with convertible tops.
Engineer and current owner of two Sebrings.