Same here as far as the right shot registering. It's only not registered if the ball limps in there and then dribbles back out.
The main multiball mode in this game is pretty clever. The 20-second timer is actually a really long time to not cradle a ball in MB on that playfield. You definitely earn that add-a-ball if you get it. It's also highly desirable to wind up in a situation where you can cradle two balls and send the third to the ring to increase jackpot (better have staged flipper skills btw). I've always wondered if jackpot placement is based off of what wrestlers you collected in what order: so if you did Yokozuna, Doink, Bret Hart, Tatanka...does the jackpot go left, left, middle, left? Or is the jackpot placement just randomly generated?