Joey Froze twice last night

I'm sorry if this has been mentioned,there are so many threads. Last night watching the NBA on TNT the joey in the bedroom froze with the picture still on the TV. The box did not freeze up just the channel. I was able to access the guide change channels which worked fine then switched back to TNT and the picture was fine but a half hour later it froze again, changed the channel and came back. Anyone else expereience this?

Also I went from a 922 and 722K to Hopper and 2 Joeys, 3 tuners does not seem to be enough when will a 2 hopper system be able to communicate with each other?

Thanks

John