No worries mate. As far as I can tell the actual bug is just a display problem but obviously once you change a few things and watch everything else changing too, you completely lose track of what your real settings are without the trick I posted. I'd love to pretend I went through some clever diagnostic process but to be honest it was blind luck that I spotted what it was doing
Funny thing is I didn't even notice this was in the X Box forum when I replied, I'm actually on PC so it's a good job it's not a platform-specific issue lol.
I never really forget my settings because I have a system in place of how I set them. But it's impossible to set them if the proper modules aren't there, or if by changing one it alters others. But this trick will greatly come in handy, as how I set my priorities I get very OCD about.
Found purposely or accidentally matters not to me, you found this out, and I thank you for it.