While you're at it, check the latch pin for wear. You might be able to compensate for that wear, either by moving it sideways a little, or removing it altogether and turning it 180 degrees.
Ideally, before doing that adjustment, you should back off on the adjustment of the two rubber bumpers near the taillights. Get the hatch to close as tightly as you can with the latchplate first, and then adjust the bumpers back out to put some tension on it.