Just explain to them that one of the three receivers has a different household key. And yes, that is what the household key is about. Right now, the one with the odd number is reporting it's not in your household. Make sure you have those numbers handy when you call.
Wow, wonder how that happened! The EHD is working good on it and I have never moved it. It is the same DVR when I called Dish to activate the EHD. I will call them. Thanks again for your help.