I have to come forth and say that I may not be the best person to talk to about this, as I'm only PTing in the mid 160's, and retaking in October after a June cancel.
That being said, I think that yes, you definitely need to review all of your answers whether you got them right or wrong. This is the case for all levels of LSAT takers, whether you're shooting for a 180 or a 155. Also, the way you review these answers is important. Don't skim through each question because you remember it, really try to think logically about each answer choice - as you would on a normal exam.
And if your wrong answers really are distributed evenly across the board, it's hard to give you a detailed critique. I'm gonna go with the advice that I've heard time and time again from high-level testers, which is to maybe not focus so much on taking PT after PT, but drill sections. I've found this to be particularly helpful with logic games - before I take a PT I'll make 2-3 copies of each game just so that I can do them over again a couple times in the days following the test. LG being the "easiest" section to improve upon, I'm sure you could benefit from a study plan that includes this. As for LR (typically the 2nd "easiest" section to improve), obviously it's harder to make copies of 8 page sections. But if you have older PT's that you want to use for this, or additional books with questions, then I would suggest doing those. Hope that helps, and good luck in October, we're gonna do awesome!
(WRT the above post, a raw score of 80 really does vary test to test. Could be anywhere from 161-167.)