Directv installed the dish and the one line swm...tv and receiver work great and can record 2 channels. The tech told me to go to Best Buy and get another hd dvr for my second tv. I have activated the new receiver with directv and was told i did not need a 2nd swm odu. I cannot record 2 programs so I called directv and they would not let me buy another swm odu. . they said go to best buy...is this correct?