It has been mentioned, in game I believe, that custom key binds might not always work how you expect. It's taken me a while to get my controller setup how I want.
Can you get a clip? your binds are double RS press. Showing binds means little without showing the actual issue + class/aspects. Like with my Xbox binds - i had on knockout + RB hold finisher/melee, so I couldn't finisher until knockout ran out