I have 4 311 receivers and a quad Dish 500. About 2 weeks ago, when I tried all 4 receivers, I got an error on 2 of them that an error had been detected on my switch when I first turned them on in the morning. I did a hard reset on the front of both receivers, and have never seen the problem again. Tonight, I ran a check switch on 2 of my 4 receivers, and got a message that the test found less satellites than were previously found, and on one I said save the new results, and on the other I said cancel, thus keeping the previous results. When I looked at the details of each test, the one that I said save on, showed odd/even polarity on sat 119, but only odd polarity for sat 110. The details of the test that I said cancel on showed odd/even polarity for both the 119 and 110 sat. If I press the sys info button on the remote for each of the 2 receivers I ran the check switch test on, each show greeen for both the 119 and 110 sats, with a status of "GOOD", no signal loss detected. I don't know how to interpret the different results for the polarity test of the 119 sat I get when I run check switch on each one. The results are 100% reproducable each time I run the test. Any help interpreting what this means would be appreciated. Thanks