Deleting default keybinds

HOW??? 

Why can't I remove the default keybimds from things I don't want bound? Example I use a mouse button to prone. Whenever I pish it I equip my secondary aswell. Why? Why can't I remove that bind? Same with all other default binds. Unless I change the defaults in every menu they appear (and alot of them are in 3 different ones) they get double bound. 

Mouse binds are just locked with absolutely no way to change them. This makes the game almost impossible to play. There only max 5 buttoms on the mouse so you can't just change thw default ones to somethjng else. It's breaking the game for me. I can assume there are others having this issue aswell. Unless I am missing something and I hope I am. 

Considering the beta didn't have this issue I have no solutions.