This could be due to PIP on the hopper using two tuners. I consider it a bug that two tuners are used when PIP is not active. To test this theory, use swap to get the second tuner to the main Hopper output then play back program off the DVR. Then swap back to the original show. Viewing status should at this point show an available tuner. See if the Joey can then watch a third program.Second, my wife was on the TV with a Hopper watching a show live on HGTV at the same time it was being recorded. At the same time, a game was being recorded on Fox Soccer Channel. PTAT is disabled on this Hopper. When I tried to watch something on the Joey TV paired to that Hopper, it indicated the tuners were all being used. It showed one HGTV show "Recording", the same HGTV show "Watching", and a soccer game as "Watching & Recording". The time remaining on the HGTV listings was the same, and changed at the same time, so I'm sure she was watching it live as it was being recorded. Is the Hopper really using 2 tuners for the 2 HGTV events, or is something just set up wrong?
You may also may be able to select the "Watching" show in Viewing Status on the Joey then change channels.