IMO, you have the latch adjusted too tight for it to release smoothly. If you get the rear latch released, you will notice a screw (Allen Head) on the back side of the hook. Loosen that screw, then unscrew the hook a bit to relieve some of the tension when it is latched. Once you have it where you want it, re-tighten the Allen head screw to keep the hook securely in place.

You want it adjusted so the top does not rattle and to where when you push the release button the latch will release with only moderate effort effort. Also, you do realize that when you push the release button, you have to pull down on the handle at the same time to release the latch.