I've seen her get on a few times to fix a pony or show a student something.. posting is fine, canter is fine.
What has me a little worried is that I watched her get on one of my school horses that "drift" towards the gate and she couldn't correct the problem very well. She was trying to use a direct rein and opposite leg to guide her but the horse just bent more and continued to bulge the shoulder and drift toward the gate instead of applying and releasing same side aids to "block" her and straighten her up. I've seen another student of hers repeatedly have the same problem on a different horse.
I've also seen saddle fit issues where everyone one wears a fleece half pad when its not needed. She put a riser on backwards and UNDER the saddle pad. I've been in the tacking area while she was helping one of my students (that I passed on to her for a few lessons). My student correctly hooked up the girth to the back two billets to balance the saddle and the instructor "corrected" the student saying "We always use the first and third billet strap for equal pressure and the third one is just a spare."
She is older than me and has been in the business longer so I feel that she should know better but I'm unsure how to go about correcting her with out insulting her. I was pretty embarrassed when she got on and could hardly steer the lesson horse when my beginner student (who I passed to her) was doing a better job just 5 minutes before. Any thoughts?