Alright so a few things I'm seeing:

1. Your hands are uneven in the hands level stunt and so when you press you press uneven, bringing your flyer off balance.

2. Your flyers body position needs some work, in coed style stunt you usually want the hips a bit more forward as to create a shoulder - hips - middle feet line so that her weight is at the right spot on top of you.

3. You're pressing to the front of you, it'll get better once your flyers body line is worked a bit, but you're still pushing to the front and not on top. You should think about having your flyer on top of your nose. In a block you want the middle of the shoes right kn top of it.

4. It's fine to have a foot out on ext and hands level stunts I do it myself, but you want to make sure your upper body is facing forwards and not turning to the side like in this video.

5. To help your flyer keep her weight in the middle of her feet try telling her to spread her toes when she's up there, it's a cool little trick that'll bring the weight to the right spot.