I went to watch a movie today after checking EGV's schedule on their website. When I got there the times had changed and I had to watch another movie.
Was I unlucky or are the schedules always this dodgy?
I'm sorry to say that movie schedules are notoriously unreliable here in Thailand. They change daily depending on demand.
Websites are usually fairly accurate, for example Movieseer; http://www.movieseer.com/Index.asp?Channel=2 And also the cinemas own websites.
But I'd always recommend phoning in advance to confirm times and showings. All the major cinemas have English speaking staff.