This all seems strange to me. I've never had a problem with condensation before and I have stored beers in fairly extreme temps. Did you have condensation problems before adding the water pan?
Also, did I read correctly that your primary carboy has a spigot? If so, I would buy a new brewing bucket as a first step. Any additional seals or openings add more variables to the equation, which in this case only have the potential to cause problems (e.g. contamination, leaks).
Good luck with the boss!