Thought I'd update this with some numbers. And to suggest something that hopefully you're doing already, so today I took 62 and 68 back-back, kind of; I went no breaks through the first five sections, only used the proctor app for three of the first five, and then took a 15 minute break and took the last three timed sections with the proctor app, all of this at my test center.
PT: 62, (-2), 180
An error in LG, and #25 in LR1
PT 68, (-4), 178
Two errors in RC, #15 in LR1, and #17 in LR2
On a positive note, I made sure not to misbubble anything this test, I had two misbubbles on 67 yesterday. That's my suggestion, it sounds dumb, but I almost always, LG from 68 was an exception today, finish before the five minute mark and take a look at questions I'm unsure about, what I did today is check my bubbles, then do that. On a less positive note, since I've taken these PTs before, all three LR errors I made today are ones, if not the only ones, I missed or was unsure about last time I took these.