Legion Go and Bazzite

First day moving to Bazzite on my LeGo.

I have a few questions.

I noticed steam states there is an update but every time I update and restart nothing happens. Am I not able to do steamos updates via bazzite?
My back buttons on my Legion go are mapped already. Is there a way to clear them? It causes conflict in games. Even if I map the back buttons to something else the game registers the new binds 50% of the time.
I also noticed if I shut down my LeGo. It looks as if it's booting up again and checking for updates? I'm assuming that Bazzite OS looks for updates when you shut down?