Well, it seems to have gone away.
After I did all this, I then reboot Dreamweaver because I was getting some "saved outside Dreamweaver" warnings and when I came back into DW, the error in the Behavior window was gone and when I tested it, it worked!
I think I'm in good shape now but I don't really know what happened. I guess, metaphorically speaking, all the stars had to be aligned correctly.
I guess, for now, this is settled.
Thanks for your attention.