Dr Rox, there are only a handful of markets getting the Jacksonville game (Jacksonville, Tallahassee, Ocala, Valdosta, and maybe Savannah) so my guess is that CBS will have the viewers of one game go to the other game before starting the prime time lineup.
FOX had a major league snafu (pun intended) for the baseball playoffs and made a mess of its own schedule in terms of airing the X Factor, not only on its east coast feed, but its west coast feed as well. They are having to preempt their Tuesday night schedule to air (or reair) the entire X Factor episode from Wednesday night, and their Tuesday night shows won't be back until after the election.
It is exactly that sort of thing that networks try to hold their audiences together on both feeds; it is a pain for the network executive who plan the program schedule to have to deal with weather delays for live sports programming.