Replying to STH2 Wing Adjustment

So I've been riding on my STH2 13 bindings for a couple of weeks now and I'm finding myself having to adjust the toe wings on a pretty regular basis. I'll get a little bit of play in the toe after only about 1.5 days on them. I can feel some movement when I'm clamped in if I pick up my fott and shake it back and forth. This is something I never ran into with my old STH14 drivers.

So what's the deal? Did I get a defective pair or is this just what I should expect?