It is not often that they will sleep on the ground. I personally have never seen my chameleon do this, but I think there have been other members who have posted that before. You do not have a light on at night at the top of the cage at night or anything do you that would cause him to want to go to the bottom? As long as it is night time, it is ok, but it is unusual. As long as it is not in the day time as I am sure you know they do not sleep during the day. A far as shedding, babies shed pretty often, anywhere from every couple of weeks to once a month or so and as they get older it will become less and less and then they more or less shed in party parts.