haha, Cute photos!! I'm sure everything is okay, my male will sleep in the weirdest positions that i'm sure cannot be comfortable in the very least. He's fallen asleep on a leaf before, which was bent over and nearly broke from his weight, the leaf never recovered. he's fallen asleep upside down facing straight up and down, and upside down hanging on the underside of a branch, which worried me slightly but it turns out he was fine.
I'm sure everything is okay with your little cutie. just watch for other signs of weakness or illness if you are still concerned in case of the habit returning. If there are no other signs of illness i would assume that things are alright and its just a habit.