To reproduce

1) Go into options

2) Select any command with an empty assignment slot is empty (e.g.  "Select", secondary assignment column)

3) Assign a key that's alright assigned (e.g. "A") to that empty slot

4) Observe that the "A" key is now both assigned to the "Select" command and the "Attack Cursor" command

 

Expected Behaviour

Assigning an already-assigned key should de-assign the previous assignment. You can fill every empty slot with the same binding if you want.

Hello Headbomb,

 

This is currently an issue we are aware of and will be resolved in future updates. Thank you for posting!