Ooo thanks - def helpful info.
That's very odd that it thinks your keyboard is a controller haha. Random thought, if you have an older, more basic USB keyboard kicking around the house, could you try that and see if that fixes the issue with being stuck walking up-left?
I think I'm going to add in a toggle into the Settings screen to enable controller support (that will also be off by default). I can also probably start making a list of device names to ignore as controllers.
I'll also look into the controller mapping screen not saving properly, were you going to it from the Main Menu? or from in-game?