Beautiful horses especially the curlies!! I am a western rider and I say that saddle is definitely to far forward! They used the back strap as a girth that's suposed to be in the back not the front O.o how strange.
His saddle is cinched on a three-point instead of a single point. It is something they do with trail saddles to even pressure from the cinch on the tree and horse. Some have it built in:
Also his saddle might me sitting forward, but the rider is sitting very far back and leaning on the cantle, having the saddle more forward means that he is still sitting with his weight on the correct part of his horses back. Not forgetting his horse is gaited and, I'll say, gaited riders do strange things sometimes.