I am having difficulty getting complete operating results from the instructions for adding two controllers to a series of selectors on my panel. The problem is that while I am following the instructions included on the back of the controller package. I cannot get the controller closest to the bank of connectors to provide power to the main lines unless I connect a jumper from the cab to the C terminal on the remotest controller from the cab(s). Does this make sense? The controllers do provide power to each of the reversing tracks as needed, that part works fine. Any ideas anyone?