The same thing happened here (Central Minnesota, Charter Digital) for a couple of days. It was to do with the fact that Nickelodeon made changes to their lineup concerning Noggin and The N. After the change was made, The N was listed on both 79 (GSN) and 116 (The N).
This morning, all was back to normal, and apparently it wasn't Charter's fault, so I suspect it wasn't Dish's fault either - most TV services get their EPG data from Tribune - especially since two different providers had such a similar problem.
Hopefully since my problem is sorted yours will be too.