You guys are a cute pair!
In the first pic you look left behind as a result of a funky distance. You've done a nice job keeping your position despite this, just next time try to give your horse more release.
I can't tell much from the second pic, because half your leg is hidden behind the standard. from what i can tell, you leg seems to have rolled back a very teensy bit- redistribute contact to the inside of your leg. Point your toes forward and angle your stirrup so that the insided branch leads the outside. This will help keep your ankle supple.
I'm wondering if your stirrups in the secong pic are a smidge too long, causing you to lift your seat way out of the saddle. Your not ahead of the pommel, just up to high. This is a mild form of jumping ahead, but you seem like a smart rider who really rides with her horse.
I love your release! You have such a nice feel on your horses mouth, and your hands are pressed into his neck offering you support. Good job!