You are also missing C4 and W7, I see. Is the receiver a DSR-922, or a DSR-920? I have read that the '920s can lose "tiles" if they are unprogrammed from the list.
The only idea I have is to maybe change your LNB setting from C only to C/Ku or others if available, then back if needed. However, I do not know if this sort of change could eliminate anything else, so I would check other sources too.