Here, Cam is portrayed as forgetful, to the point that Mitch writes up a "contract" for how they'll share time with Lily for the summer, and even has recordings of Cam saying things he claims he didn't say. But in Regrets Only (2011), it's the complete opposite, with Mitch being chronically forgetful, including forgetting to mail Cam's invitations for his benefit, while Cam remembers everything, including things that are unintelligible and things Mitch himself doesn't even remember asking for.
When Andy and Haley are saying goodbye in the airport, the man in the military uniform walks past twice.