Last year, when we bought the Thomas Remote Control set, we didn't use the 18V fixed voltage power supply that came with the set. Last weekend, I set up the loops around where we'll put our Christmas tree, and we decided one loop would be dedicated to Thomas, so I just connected the set's power supply to it. I'm surprised at the voltage readings I'm getting from the track. I'm getting 39.6V AC when I check the middle rail to one outer rail and 0.0V from the middle and other outer rail. It's that way around the entire loop, as if the outer rails aren't connected like they're supposed to be in 3-rail. The readings are accruate and the voltmeter is calibrated. Any thoughts on what's wrong here. BTW, Thomas runs fine on the loop, but I haven't put anything else on it.