I personally think your stirrups are way too short. Your leg has swung back in all of the pictures because of the extremely short length of the stirrups. I can see that you are having difficulty stretching your heels down. I would like to see them rolled down two - four holes, depending on the hole length. I would start by lowering them one hole at a time to get used to the feeling.
To measure the correct length of your stirrup, you should drop your feet out and then see where the stirrups touch. They should be touching your ankles, as shown in this picture.
As for the jumping, I think you are a very strong rider and you only need a few tweaks here and there.
- I love how you are not over-jumping your horse. Most riders tend to fall forward when jumping, but you have stayed back and let your horse jump for you. Excellent job there.
- Your heels have popped back from pinching with your knee instead of letting it relax. Lowering your stirrups will help this.
- In some of the jumping pictures your back is a little rounded, so try to keep it flat.
- I love how your eyes are up and you have a nice release. I would love to see you with an auto-release. I think you are at the right stage to learn that.
I'm not a Cross-Country person so I'm not going to critique that, but your horse is gorgeous and you two make an excellent pair.
Keep up the great work!