May be just a style/philosophy thing...
Check your front foot. I know you are a no-stride, lift and drop the heel guy but... You start out on a nice stacked base. Then, when you lift, you actually bring your front foot heel back toward your back foot and open your hips prematurely. This causes you to narrow your base, fall slightly back and out and roll out on the outside of your front foot instead of staying nicely stacked and hitting against a firm front side. I think if you can keep that front foot from rotating out early and maintain your nice wider stacked base, this might get you back on track.
Like I said, this might just be a style thing. I think I've seen what you are doing as a taught method.