Well everything has what they call a "burn in" stage. There is no guarantee that wrapping X amount of copper wire around a magnet will produce the EXACT same results every time, it very well could be that each ballast burned in slightly different. It's reasons like this I prefer separate ballasts. If you think one is wonky you can send it back. If the system had not been "less than a month old" I also would have said to check the caps. But hey since it is new, call PFO and explain the problem. They may send you a new one. Mention something about asking about the problem first on a large reef forum community, maybe they will want to help more so that you don't send out a bad message about PFO.