I need help with my side-saddle riding. I CAN'T post to the trot. My mare is an angel side-saddle and does the most LOVELY walk to canter transitions but coming down from canter to walk, she goes into this AWFUL fast trot. I can hardly stay in the saddle let alone post! Astride, I can rise trot and sit trot REALLY easily and my mare doesn't run into the trot. Please help me!