Joe,
"Correct. But after it's charged, then watered you shouldn't charge the battery again until it's discharged atleast 70% indicated. That's where my problem lies. They don't discharge it enough before they put it back on an overnight charge it then boils over."

well that is a problem then, even if they charge it too early it still shouldn't boil over UNLESS they are adding water to it when they shouldn't be. OR... something is going on with the chargers and the opportunity charging cycles, maybe they are hitting the batteries too hard and causing the acid to bubble and gas alot. That high expansion rate can build up acid around the vent caps and actually blow it out and it will pool up and run down between the cells and out the bottom of the battery casing.
I think i would have the battery people come out and check the charging rates on these chargers and make sure they are not set too high.

As for the watering systems if you are not having them maintained on a regular basis they still could be over filling the cells, which would contribute to this problem alot. They do make it alot easier to water a battery but they are not full proof, acid still corrodes and builds up inside the caps causing the floats to stick or just not shut off when they are supposed to, they should be replaced if they ever start hanging up like that.