I agree. If it leaks, its time to move up to the next size. That solves most of the issues.
The thing is huggies leak but the same size pamper won't. My 3 month old wear huggies and if she a little active it will leak. The same size 2 pamper is good enough for overnight, its still a little big so the next size is not the answer.
May be pamper is a little bigger than huggies.