I've experienced having another caller answer my vocals, it's quite a coincidence for more than one caller to be in an area at the same time.
I think you most likely haven't gotten into a good population very often if at all. All this other stuff is important, but takes a back seat to being where the coyotes are. Calling can be tough this time of year, especially when fur prices re good. Not very many coyotes escape persecution right now.
