SUNBEAM Stations are going through an ongoing dispute with DirecTV at this time.
http://www.miamiherald.com/2012/01/18/2596172/wsvn-directv-still-slugging-it.html
In regards to the Savannah move, that was I think because they were literally moving everything out and setting it up. MY guess was the space wasn't fully ready till just a few hours before the newscast on Monday.
Because its tradition. WSVN as funny as it is changes some stuff quickly, but they are very slow to change anything. That name predates to when they were an NBC affiliate. Some history for a truly remarkable station.