I thought sats were designed with rather narrow uplink beams such that it would only be able to take signals from a very narrow couple areas.
Might it be possible that someone accidentally turned Echostar 7 on?
Some of the more recent DISH Network sats are. Since DISH knows they uplink from like 6 sites around the country, they have their more recent sats built for uplink spots so the uplinks can come from the areas of their six fixed uplink sites.
Of course that doesn't prevent one from running an uplink in that spot (fixed site or mobile). I discount the mobile truck uplink idea because I can't think of a truck that could uplink in those freqs/polarities. Most trucks are built for the Ku-band that is not in the DBS frequencies and some trucks are built for c-band uplinking.
As I was watching the interference last night, Echo 7 came to mind. I wasn't sure if it was turned on and creating interference or if DISH might have been turning on and configuring some of the Echo7 transponders as replacements for any potential Echo14 outaged transponders or wacky transponders. You can see stuff on the analyzer but because Echo 7 and Echo14 are in the same antenna beamwidth, you can't pick off each sat separately to analyze things. You'd have to be in the dish network satellite control center to know exactly what was going on with one or both sats and find out the thoughts of the employees in restoration plans (i.e. if trying to use echo7 to restore some transponders or just sending new/different commands to try to get echo14 to act properly again).