I would just BR/Review all the stuff in the 70's to really get a feel for HOW you are making mistakes and WHY you did not get questions you "usually" get right. That has made a big difference for me in similar situations.
Yes, it is very much doable, and I would recommend retaking tests to really learn from your mistakes/lucky answers. Don't make that the focus of your prep or anything, but definitely mix them in if you are not already doing so.
Yes, it has happened to me. What you have touched on above is something that is pretty normal actually: a combination of losing focus and time pressures forcing mistakes on us. The LSAT tests our ability to stay focused. It is an intense exam.
Take a few weeks to focus on LG specifically by foolproofing games 35 and down. Figure out what's happening. Pressure? Mistakes? Sloppy diagrams? Too slow? Too fast?
I concur that your pacing/speed is about where you want it. You just need to identify the TYPES of mistakes you are making and improve those specific skills. The process of understanding why you are missing questions is key.
@dan_the_mann8989 My honest opinion, those are pretty recent so yes they do show a pattern: you repeat mistakes. Personally, I believe traffic violations are not as trivial as you make them seem. If you like, I would love to read your addendum.