OK chief.......lets get a tad more back tension so that your bow doesn't move left at release.
Make sure that your bow arm is straight at the target, AND, your shoulders are straight at the target.
Looks like, to me anyway, that you are having to 'hold' on target with your bow arm shoulder muscles cause you aren't getting complete alignment and bone structure holding in your shot. This is causing the ever so slight, but quick, movement left at release.
Other than that......you got it down hoss.