In #1, your weight is to your left too much by your upper body compounded by stride leg leg.
In #2, you continue this weight to your left and your body is anticipating this sift, but now going
forward. Thus your stride leg is "walking outside" your stride path.
In #3, your stride path is open to the extent that your entire body is now walking to your left,
not to your target.
In #4, you now throwing across yourself, you stride leg is now compensating for this "off-balance"
by leaning back to your glove side.