Regardless of whether the actions are within the same context. (For example, I may want Jump and Dismount on the same key; those are different contexts; though I may want Move Forward and Move Left on the same key, and those are the same context.)
Every time I try to bind a second action to the same key, it forces me to either clear the other action's bind, or cancel binding the current one.
I have seen no options to change this behavior. =\
I have, however, noticed it's possible to make modifications to the game...
If there is no way to do this normally; how would I go about either making a settings file that contains custom keybinds, or how would I modify the client to have this behavior?