On the first pony, you really need to bring your stirrups up a hole or two. You're really reaching for your irons, which has the domino affect of heels up, leg swung back and jumping head.
The pics from the second pony show that you're a pretty capable little rider. You are on the verge of jumping ahead though. There's a lot of air between your butt and the saddle. Remember crouch down, not jump up.
Otherwise you're upper body is consistent. Good long release, flat back, and eyes up. You and your ponies are spotlessly turned out as well.
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse