That's one of the things that throws me off the most, when I go into a film expecting it to be a certain way because of trailers/the way it was marketed and ending up with something completely different. Same thing happened to me with Blade Runner, the back of the DVD box literally says "Action packed film!"
I can understand why that happens, I mean - "Action packed film!" is more likely to sell than "Methodically paced Sci-Fi film meant to question our perception of reality" , but still ... it annoys me