In the last pic the tubs might be wet from spraying them down to try to get them to breed? You also might not see the heat tape if the tub is pulled out since the heat tape should be all the way in the back. These are only guesses on my part though and since Avi only reads this thread and don't respond any more we won't know their side of it....
id just about agree with you, but take a closer look at the hatchling rack. you can count how many snakes are in them by counting the ones with condensation in their tubs. but who knows,,,, maby they all got misted minuets before
spooky