I have this problem. For me there's a huge difference between a one legged jump and a two legged one, I can grab the rim well wih two hand jumping off both feet,
10 feet rim, but when i jump off one foot i dont get that high at all, i can barely grab it with one hand. The problem is I cant palm the ball, so when i grab it with two hans i can wave my arms and that takes away a lot of jumping...