mine would pop up and stay fine, it was when I closed it the tension on the spring rod would cause one corner to not shut flush. now I have no tension on the spring rod at all...
My car is the first one pictured, the blue with black stripes car. I've the wing, but make sure you give it enough clearance so when some goofball slams the hood, the wing tips don't contact the genders and ding them. The wing adds a bunch of weight to the trunk lid and it likes to come down hard. With that said, keep it flat black!