This photo explains what I am talking about. Pulling it shut is pulling on that bolt you see. It is effectively pulling down on the nut. The hinge is pushing up in the "bending" the trunk. If that nut that is mounted in sheet metal gets pulled down just a little, a fraction the front of the trunk (nearest the rear window) is going to go up right? So to fix it you could push UP on the trunk opening it "too far" and "things" would bend right, the structure of the trunk inner and the hinges, maybe where the hinge mounts too, the pivot would come down, lowering the front of the trunk.