When you are receiving your PT scores, are you reviewing the incorrect questions? Also, if you have been consistently studying for the LSAT, you may be burning yourself out. I would reduce the time studying (like from 4 hours to 2 hours) for a week to allow yourself some space for revaluation. Focus on the drills, but more importantly, see if you are able to explain, aloud, your reasoning for picking an answer to a friend (or a rubber duck).