Thanks for the advice. So far I really think everything is just play, but I wanted to get some ideas before things got out of hand to know what to watch for and how to handle it.
I have also been thinking about treating Cincy as alpha, and I don't know if I am hesitant because I assumed Sadie would be, or why. In watching the dogs more closely, although Sadie is submissive, she does seem to be alpha when she wants to. What I mean by this, is if she wants a toy, bone etc, she will take ot from Cincy. If she doesn't care she will drop it and let Cincy have it. She also tend to lay on the couch with me, whereas Cincy will lay on the floor (Doesn't alpha get higher position?)

I don't know if this is dominance or mothering or just dute, but Cincy will run to the window barking. Sadiw will follow. If she does see anything worth barking at, she will push Cincy away from the window and smack her on the face, as if to say shut up silly! There ain't nothing there. It is really funny to watch.