In attempt to fix this, I usually move my inside leg back slightly and apply pressure (she responds better to that than just pressure), pulse the outside rein to balance her, and use the inside rein to create bend. I twist my shoulders towards where I want to go and keep my hips aligned with hers. Still, while it works in a big arena, in the small one she's drifting all over the place and I can't seem to get her into her corners while keeping the appropriate suppleness and bend. Is there anything I'm doing wrong/should change, and what are some good exercises to keep this from happening?
Any help would be greatly appreciated.