I often have the same situation. I think it's a matter of your personal preferences in sensibility and FPS, eventually cg_fov. I guess you don't have to change nothing more. You just must feel comfortable while playing and focus on your moves and heads (as u noticed ).
when i play(just start to adjust my config)most off the times im first dead in 1v1 fight.
even when most move slowly from left to right or get fow and move right or left