I just recently purchased a twelve-year-old Arabian/Holsteiner mare (Anna). I plan on doing hunter/jumper on her, but I've noticed that whenever I ride tracking right, Anna rushes the trot and takes a long time to slow down. Then, when I ask for the canter, she refuses. When I finally do pick up the canter, Anna speeds up into a gallop and is very hard to stop. The same thing happens when I lunge her.
When I track left, she does just fine with everything. Her canter is collected, she stops when I ask her to, and she doesn't try to speed up. I don't want to start jumping on her until I have more control tracking right. How can I fix this?