Other mistake: Near the end when Lindsey goes to Fenway to stop Ben from selling his tickets, she borrows binoculars from someone to find him across the field. She's looking through the wrong end. The way she's holding them, everything would look tiny, and yet she still sees him.
Other mistake: When Ben gets home from the costume birthday party and laying in bed he puts the TV on when he finds out the Sox won the game. The alarm clock on the nightstand reads 10:38 when he first puts the TV on - then a couple of TV clips later it is 11:27.
Answer: At the stadiums that I've been to there are ushers posted at the top of the stairs that lead to seats closer to the field. You can't get down there without showing a ticket for that section. They also show her trying to get to that section and being told she can't go in that gate. Also, she sees through the binoculars that Ben is about to sell his tickets and she wants to create a diversion.
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