I think it ended 20 minutes before the hour because they showed it with no commercial interruptions. There may have been some edits, but I'm thinking it might not have been after reading the comments of those here who saw it and said the cut scenes were pretty minor. Did what you saw have more cut? I'm wondering if some people saw different cuts of it depending on where they live? That seems like it would hae been pretty hard to do though and been hard to get the different versions distributed. I think there was just one version.
No, according to Redstate.org, 32 mins were trimmed from the movie. They have the deleted clips online there.