Update: I just graded it again with guessing, and I scored a 150. So I made 7 point increase, I guess that's something :) I only solved 1 question on LG :)
I have this same issue! On my last couple of PTs, my 1st LR section is hot garbage while my 2nd section is remarkably better. I'm guessing that warm-ups before a PT can't hurt.
Who had the LR-LG-LR-LR-RC test? Did you find the 3rd LR significantly harder than the first two (I did) I am guessing that is the experimental one, hoping for confirmation.