I could be wrong because I don't do dressage. My understanding of using the left leg to turn left is to have the horse bend around the leg.
I have a friend that I'm helping start his horse. We ride western and that's how he wants to cue his horse. I did explain that it is confusing for the horse but he still wants it done that way. For someone, like me, that uses the opposite legs to cue the horse to turn, it also makes it confusing and harder for the rider, unless you are used to it. If you are consistent with the cues you use, you can train the horse to turn with the leg on the same side. In a way the horse is still moving away from the pressure by bending its rib cage. It's just not the way I like the horse to turn. Posted via Mobile Device