Character mistake: When Michael confronts Joanna in Chicago, he displays his NYPD shield as though he is about to arrest her, although he would have no jurisdiction there.
Character mistake: The conductors on Michael's train repeatedly call the seat check slips "zone stubs." Michael could make this mistake, but no conductor would.
Answer: The opening credit scene (waking up, in the kitchen, the drive, being on the train, and walking through the terminal) is montage where each cut represents another day in Michael's life. It's meant to show the monotony of his life through the whole year (or even years) and how he follows the same routine everyday.
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