Hhaahah LOWER YOUR STIRRUPS TEN HOLES!
I know you're aware of it...but I think that is causing the awkward look to your posting. I'm GUESSING that if you lowered those stirrups so that you could have that nice long, stable leg....you'd be just fine
You ride very well, I admire your turns on the forehand/haunches...spins, whatever the term is! You and your horse make quite a good team. I don't think anybody is wrong on the posting. It does look funny, but it's not anything off-timed or completely wrong...I honestly think it's the stirrup length that makes it look forced. Post a video without jockey style to be sure that's it, but again...very nice riding otherwise.