Well, if you continue the pattern you won't have to bother with catching two in one hand. I used to mess up the last catch all of the time, too - basically, as long as it just hits your hand or something, you know you could have caught it, and that's what matters. If you do it over a bed or couch, you can just pick it up again and keep going.
Yeah, I feel that too sometimes. I didn't say anything about it because if people don't discover it themselves, they tend to exaggerate the rotation and if your force it it just messes with your pattern. You definitely feel the rotation doing tricks like the half shower or reverse cascade, though.
If you guys want, I can try to make another tutorial with some simple derivative tricks (like half shower, reverse cascade, and juggler's tennis) in the coming days. They add some spice to your practice sessions :P