Figured it out on my own, but thanks. Speaking of "test recordings," I discovered something very unnerving. A short failed run that died on stage 1 before the one I recorded (Orange's hell portion of her second phase is particularly dangerous for Reimu A) didn't get recorded due to some error. This same error happened when I was recording my SWR lunatic run (I had to go through the replay 3 times to rerecord parts that were messed up). It appears to be completely arbitrary, random, and beyond my control. To top it off, you obviously can't do test recordings to make sure the recording you have now isn't corrupted.
But now, proper rage! To test my dimensions, I did LLS extra. I perfected the stage portion (despite the fact that I REALLY should have died a few times), things went normally against Mugetu (that is, bad), but...I died in the most ridiculous way possible: On the beginning of her second phase where she spits ineffectual bullets at you. Then...the rage happened.
I beat Gengetu one death no bombs. You wanna know where that death was? Her third phase. In a completely idiotic maneuver I made. The rest was damn impressive but these two deaths really make me hesitate to keep this run (though if nothing else I'll keep the perfect stage run for instructional purposes). If I hadn't made those two ridiculous mistakes, I would have beaten this NO DEATHS. D: