If you received 2 more points per section, that's going to transform your 162 into a 168. That's why it gets much harder to see increases in your score. Each question matters at this point. You really have to be clutch.
I underperformed on the Sept. LSAT as well, and I've been through the powerscore books. Sometimes, I'm not sure how much the powerscore books will truly help outside of setting a foundation.
I completely botched the games section, though, and I feel that I need to really ace the games for December in order to improve the most. I'm not sure how much I can improve on LR/RC.