Thank you for the post. I will continue my review process but pay some extra attention to how I came to the wrong a/c, why I didn't pick the correct one, etc. Along with hashing out the reasoning of the argument. I think one of the things that has been frustrating is that I haven't been able to figure out why I'm missing the ones I do. They seem random but most likely are not. I just need to find out what's holding me back.
Checkout LSAT hacks and Manhattan LSAT for explainations. By the end of review you should be able to tell somebody why each incorrect LR question you got wrong is wrong and why the correct AC is correct. At your level of performance, it really comes down to review and internalization. Keep at it, you'll get a breakthrough soon.