I did it by photo
1. Its hard to see from the distance, so it may not be 100% accurate. Sit up straight. Have you leg/heel further back. There should be an imaginary line that goes from your shoulder, to your hip to your heel. I think you should lift your hands up a bit.
2. Get your lower leg to come back. Can't see what your hands are doing.
3. Looks like you may have gotten ahead of phoebe? Nice release though!
4. Can't tell much from the angle, but maybe move your hands up a bit on her neck to give her more of a release. Great job at looking up and ahead to where you are going!
5. Guessing you got left behind? Get your butt out of the saddle and give her a better release.
6. I think the same thing happened as in the 5th pic.
7. Don't get ahead of Phoebe. Let her push you out of the saddle. If she were to decide to put the breaks on, you most likely would have gone right over her head.
8. Looks good to me
9. Looks like you got ahead of her again.
10. I would have stayed off her back for a few seconds more.. also when you did come back to sit in the saddle, you're catching her in the mouth.
11. Looks like you are really coming far out of the saddle. I'd also give her more of a release over the jump.
12. Same comments as for photo 7.
Overall, I think if you did some exercises where you had to wait for pheobe to jump for you (instead of you jumping for her) you'll be well on your way!