Govkies tacoboy and I noticed same - a few channels were not the same like ch 20 and 27 and figured this was the lead up to a full slam where everything changes.
We were watching the channel listing on ch 7 and laughing about how we could not see any differences there yet and wondering how long it would take for that to be updated after they mix it all up.
I just hope they pick a decent order this time around.
Here is a blog post from the last time it happened...
http://tacogirl.com/2008/11/election-night-brainstorming/