It's a glitch. I've seen it before but not very often - shows all tuners in useThere must be a bug in the software. When I turn my tv and Joey 2 on, tv screen sometimes shows all 16 tuners are being used! I never record that many at the same time. And, this is before 8 pm when Primetime starts recording all 4 networks. I believe Primetime uses only one tuner. I wait 30-45 seconds and Hopper 3 starts the last channel I was previously watching. If nothing happens, I turn Joey off, then on. That solves the problem. It doesn't happen often. Still it gets on my nerves.
Well, you can go into Diagnostics and under "Dish" #3, the Switch Status shows the status (as in functioning properly or not) of all the tuners per each satellite you receive. They should be all green check marks.I wish the TV Activity screen showed the timers not in use too.
Also, if you set a tuner for one of the Monthly system/maintenance checks of one of the Premium channels, like Starz/Encore (available at the 250 package), that can take at least 8 tuners plus you other recordings and viewing live all at once, sometimes taking all 16 of my tuners. A neat way to see nearly all or even all the tuners working at once without having to manually fire 16 separate recordings at once, but that method can meet your desires, as well. Have Fun .