Yeah, I've seen that movie (I liked it, by the way. Not because it is a Harry Potter movie, but also because it was a good movie.) and noticed that. Hmm... maybe this is something we didn't know about ol' Harry- he can teleport! (joking, joking...)
I heard this somewhere else and when I went to see the movie I made sure I really paid attention during this part. I tried to figure out an explanation, but couldn't think of one.
I saw the exact mistake. Hermonie was sitting next to Percy during the Sorting then Ron was across her with Harry on Ron's left. Then when the feast starts, Harry is sitting between Percy and Hermonie
That's a great slip up. I love that one. Seriously, how could they not have noticed that one when they were watching after? How could Daniel Radcliffe not even notice he was sitting on the opposite side of the table?? lol.
Ok, I used to think this was a slip-up, but after I read the first Harry Potter book over again (a couple times) I realized that it said Percy was really eager to shake Harry's hand and talk to him. So don't you think it could be possible that the characters swiched seats because Percy wanted to sit next to Harry?
When discussing a movie, it does not matter what was explained in the book or what happened in the book, any book/movie. A movie is a story in itself and should be complete in itself. If the movie were made as a "Cliff's Notes" to a book, then it is proper to say refer to page 487 for background information so this scene will make sense. But the movies are made as independent venues.