Teddy refuses a sandwich from her mother because she says the trip to camp is "only a few hours", but it's clear that she leaves home in the evening while it's still light outside and arrives in daylight the next morning before breakfast, which is at least ten hours given sunset and sunrise times in New York during late July. Ten is not "a few."
When Teddy states the line "But I've always wanted to" on the Bronx Express in talking to her friend Francis, the movement of Teddy's mouth does not match the word "wanted".
In the final dining room scene, Teddy refers to Emil multiple times as EE-mul, but Emil refers to himself as AY-mul. Both are accepted pronunciations of the name (though neither is consistent with its feminine counterpart, Emily), but a single pronunciation should have been agreed on for the film.