FitzAusTex, Yes, Dish is aware of the issue. If you look back at some of the previous postings in this thread, Dish has responded that this is a known problem and they are supposedly working on it. They gave a workaround of rebooting the receiver after you watch a show from the EHD, but I have found that this solution does not work most of the time.
Also, I have found that the '2nd show erasure bug', that has been consistent for some posters, is not always consistent for me. It almost seems random when it decides to erase a show. Now, I will not watch anything from the EHD that I don't mind losing. If it is a show that I do not want to lose, I have to restore it to the internal HD in order to watch it! Very annoying!!!