Funny you should say that, her right split is better...I'm with you gymdog...I don't get it either!
From a dance perspective, I wonder if she is doing the left split leap because she is more comfortable jumping off her right leg? I am righty and find the grand jete (ballet equivalent of split leap) more natural with my left leg forward because the power in the jump comes from the back leg. But my right split is less pathetic than the left, and I find sissones easier with the right leg in front.