So I guess you did start your own post in addition to resurrecting the old one in the DCC topic area. Generally, you should not make more than one post on a question. Post one and be patient. People who are going to answer your question are looking for new posts, and they'll find yours, no matter where you put it.
And the answer is that you have to set up the CV's on the decoders for how to behave in a consist. Consult the instructions that came with the locos.