A couple of things spring to mind. Is your slam panel straight? If that has dropped forward then that would drop the front edge down like that. If you undo the screws underneath can you bring them forward and relocate them as that will tilt the front edge up. Lastly, where you are dipping there is a little tab on the wing itself. This can stop the bumper sitting flush. Ive got non gen everything on mine(admittedly new), and with some playing around mine is about spot on