My main problem is that I am fighting against the stirrups. When she takes them away, my leg locks in the correct position, seat is softer and hands steady out. This works in posting, sitting, or two point trot, or two or three point canter. My trainer's theory is that I am fighting the stirrups, that when they go away I go back to my natural seat that my body knows from years ago.
Thought I would see if anybody has any ideas. Here are two pics, one from riding with the old trainer, one current one over fences. The other is a video on a three year old very green broke horse where I am concentrating on the horse, not me. It is from three months ago, some things have been fixed, but at 1:20 when I sit down at the canter, it still gives the same basic way I am fighting against the stirrups/saddle - things that have changed since then, I am riding off my lower leg more, hands steadier, and I have closed my hip angle slightly, but I am still having difficulties.
Thanks (and I hope this makes sense - if not, ask)