When I turn on my 612 it always reverts to channel 71, and neighbor with a 622 has the same problem, could this be the result of an update by D for the DVR's. I have a problem with the 612 as the DVR has failed and will replace it soon with anther 612, at first I thought it was related to the same problem until I found the same thing going with a 622. Anyone else having the same problem?