I was wondering what the difference between inbounds and legacy were. I know save glitch is illegal in legacy but what else? Door edge glitch too?

check the rules on the legacy category. (press view rules)
It lists every banned trick/glitch under "Goal" right at the start.

Edgeglitches that goes OoB are banned in Legacy.
Saveglitches are banned in Legacy.
Saveload tricks are banned in Legacy.
Tricks that are banned in Inbounds are banned in Legacy.
Thus, the group Legacy is a special group of Inbounds rules which was designed to fit 'old ss/inbounds rules'.

Oh thanks for the clarification 🙂