I think they don't want to run it against the World Series. Many Sinclair stations are also Fox affiliates, so the date and time will be so it doesn't conflict.
Last I saw, they were reediting the movie for broadcast. No idea why.
RE-editing? Where did you hear that?
I do know Sinclair has said that the format has not been decided upon, which may mean they won't show it in full, but just the most important parts and then do their own journalistic investigation or something, but I don't know.