So, I record some beats, edit them down to a loop in Sound Forge, then drop them into Acid. Inevitably, the beat's off. So I go to the chopper and select it, get it looping real nice and chop to a new track... then 1 of 2 things happens... 1. It's off (usually long) or 2. It becomes a hair too long so that it can't be painted contiguously across the track(i.e. You paint and it stops, then you skip a little of the measure and paint another 1 pass.)
I am sure that I'm just missing something really obvious about how the program is structured, but... help!