After reading several posts, it seems that wetting while lying down can be quite problematic. Does anybody know where those leaking accidents come from? Is the diaper not absorbent enough, does gravity just make things too complicated or what is the issue? Any way to truly avoid trouble in this field? It also seems that for some (I guess those who went 24/7) wetting during the night seems to be no problem, whereas for others its nearly impossible. Any idea where those differences come from?