When I followed the instructions, I got that I was running system firmware version: 0.4.4
When I uploaded this last time, instead of selecting Latest (0.4.5) I selected 0.4.5. That seems to have done the trick. It flashed magenta for a while, but when it came back up I was getting legit values for SOC.
I'll be seeing if my reliability has problems like others are reporting, but I am set for now! Thank you!