It is disturbing to see. My Super Mojave is my very first lighter pigment ball, I've had a darker BPs only. Her scales crease as well when she's curled for a long time, and the blotches move around depending on how she's curled in her hide. They seem to replicate exactly where her body was touching the hides. I'm actually experimenting with slightly bigger hides this week to see how she does.
It sounds like your ball is doing great, but I'm no vet! Maybe make a call to be safe? Either way, happy herping!