Are these all the same rider? I only ask because all 4 have a different jumping style and I want to say body type. I'm generally not a skeptical one, but they just seem different.
Pic one... I'd suspect you make a lot of movement with your upper body. It can be hard to jump a horse this hollow. I would work this horse through grids to try to encourage it to jump round and correct.
Pic 2... rider seems really insecure/defensive. You're almost jumping ahead and rotating your hand back, did you get jumped out of balance, causing you to release backwards?
Pic 3... though small is by far the best position. Your centered, out of the saddle just enough and giving plenty with your hand... an auto release is all this pic needs to be perfect.
Pic 4... though it's dark, the light under the riders elbows and exaggerated butt lifting (is the term officially duck butt now?) would lead me to believe that the rider is ducking if not jumping ahead. Staying centered over the horse, with elbows near your sides, not out like wings (your horse is flying not you, lol), would make for a much nicer picture. I envy how tidy this horse is.
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