Whoa, time out *tweet*
Lets really stop and focus on those legs of yours......
They are very sloppy, very long, not placed correctly under you, nor are being used as they should be.
Your leather are too long right now - you need to shorten them to strengthen them. You are not utalizing their potential right now and due to that, I am scared for you since you are jumping.
For Flat Work:
1) Your leg needs to be under you. Your heels MUST align with your hip bones, and your hip bones must align with your shoulders. If you look down and you can see your toes, they are too far forward. If you look down and can see your heels, they are too far back.
They must be under you. You must use them to stabalize you in your tack and obtain your balance.
2) Your irons MUST be under the ball of your toes. The outter bar is at your pinky toe and the inner bar at the ball of your big toe.
3) Heels must be permitted to do their job, which is anchor you. Allow your bodies weight to flow naturally from your upper body, thorugh your seat, your legs and deep down into your heels.
4) Inner calf at horses side. You are around your horse, not just ontop.
I highly, highly, highly suggest you get put on the lunge line. No reins. Really focus on using your seat properly *on all 3 points...two seat bones and crotch* lower back strait, use your core.
Get your legs under you and strengthen them. Use them correctly, this is of great importance.
I would not get off the lunge line, until you can stabalize your lower leg.
Really work on balancing yourself, stabalizing yourself in your tack and utalizing your body parts correctly.