Only one Multi-view at a time. Either on the Hopper or on the Joey. Both Hopper and Joey can not do Multi-view at same time.
My set up is simplified and consists of one Hopper 3 and one Joey 4.
I'm using Dish Pro Hybrid 34 switch to solo hub.
I can do MultiView on both the Hopper 3 and the Joey 4 at the SAME TIME.
I mention the switch and the hub in case they are pertinent to how this works because I don't know.
I changed to a simplified set up.
I am no longer using two Hopper 3s like I used to just to get MultiView on a second TV.
I now only have to two TVs connected to Dish.
One Hopper 3 and one Joey 4.
I simplified and reduced the number of Hopper 3s and Joeys long before this update that brought MultiView to the Joey 4 having no idea there would ever be an update to the Joey 4 that would bring MultiView.
MultiView update on the Joey 4 is really great !!!
The MultiView update makes having the Joey 4 like having second Hopper 3 without having a second Hopper3.
I am able to do MultiView on my Joey 4 and my Hopper 3 at the same time.