The lost cuts were just screeners. For test audiences. This is done all the time. Whenever you see a new movie advertised as a "sneek preview" this is strictly to test it with an audience of the general public. They have several "versions" of the ending, begining, or whatever. After studying how the audience reacts to certain parts, or whatever, the final changes are made and the final print is made and sent out for release. I live in Toronto and this happens all the time here.