I have a 522 and an 811 receiver and am scheduled for an upgrade this weekend of my 811 to a 211. I was told that a second dish will need to be installed and my original dish will remain. I assumed that the new dish was for the 811 and the old one for the 522, but I've been told by tech support that I need two because of my geographical location (Connecticut). I was hoping that I could upgrade the 522 as well and not need both dishes. Is tech support correct?