Definitely Rowdy needs work on softening and obeying your leg and the bit; you won't achieve that doing jump work, that will have to be done seperately, and alot of it can be done on the ground, even; think lateral bending\flexing. Soften his head and neck from side to side, and you will eventually be able to start softening him from back to front as well. He also needs to learn how to disengage his hindquarters, again, something you can teach him from the ground, and transfer to rein\leg; because being able to disengage his hind end is only the very beginning to actually getting a horse to collect himself. If you don't have that 'button' in place, you may not ever be able to soften the horse enough from behind, to get him to lift in the front. Right now, all he is doing is dragging himself around, basically one leg after another...hollowed out, no collection. That may also be why you have such a hard time sitting, or posting him properly; it may have nothing to do with your bum leg.
Anyway, that said, the video was kind of all over the place, and a jump critique is actually rather difficult; the one jump I did see adequately, you seemed way ahead of him...