I was making a water elevator with pistons, dispensers, and soul sand. I made it so that one button push makes the water appear from the dispensers, and another makes the water disappear into the dispensers. But when the water went into the dispenser, it had a bucket of water in all of them, but there was still invisible water in the elevator. It still was raising everything that went into it, even when the water was in the dispensers! Please fix this...