I solved the problem with the more than one engine moving on command by simply storing only non-powered stock on the siding.
So Trainland placed the engine on its test track and their remote there was a nogo also. I am going to have to send it in. The locomotive is part a an ABA set. Do both have to be sent? I recall running the head-out engine on its own and it ran well. And no, the engine on the rear is not recognized by my DCS either.