I have two Bachman engines both on address 4. How can I change one? If I do one, it tells me error code 7, 4 isn't found any longer.

This is probably a dumb question but I will try. I am a newbie to DCC and recently upgraded from Ez Command to Dynamis. Since I converted most of my engines stop in a few places on the track, usually at turnouts. My layout is 4 ft by 7 1/2 long, a double track oval. I have a set of feeders to each oval. I clean the track but the same engines stop at the same spots. Do I need more feeders or is there something else I need to look at?
Thank You

I can't change engines from address three. I managed to set up all the engines I already had with no problem, I received a used atlas and it only runs on Three. I have tried repeatedly using the instructions and it does not work. I even tried one I already had set up and tried to change stations and that doesn't work either. What am I missing?

I bought a used SD 45 with dcc, the sounds work but loco barley moves. At full throttle the wheels seem to spin and it struggles to move an inch or two. I have a gp 35 that works fine. What could be wrong with the SD?

  I have a double track oval with a crossover. I am not really the best at wiring, wondering how difficult it will be to use Ez Command to run two tracks? Do I need one for each separate track? Anyone know or know where to get instructions simple enough to let a rookie like me do it?
  Thanks in advance