Your numbers don't seem out of line, depending on what your starting points were on the lifts. You definitely need the micro plates now, esp. for the OH press. Your bench should probably be higher than it is, so progress at larger intervals than your OH press. The latter should go up 2 to 2.5 pounds each session. Bench should go up 5 pounds per session for a couple more weeks, at least.
You definitely need to keep eating at a caloric surplus and add more bodyweight or the progression of your lifts will indeed grind to a halt sooner or later. But the fact that your lifts are "getting " harder right now is normal, and no indication that you near end of your NLP.