I recall back in the day being very confused when I first saw the US release, but then several years later watching the original. I didn't know the back-story o

I recall back in the day being very confused when I first saw the US release, but then several years later watching the original. I didn't know the back-story of the film. I recall thinking "I've seen this movie, but this scene wasn't in it, neither was this, what the hell?" This was obviously pre-Internet, so it wasn't easy to figure out what had happened to the movie if you weren't following the trades.