In the scene where William breaks up with Andrea, it switches between two different camera shots as they are speaking. In one camera shot, Andrea's hands are on William's shoulders, and in the other, they are not.
At the start of the film, it is Andrea's & Chris's wedding day. During the reception Andrea as a conversation with William about still having 5 mo. left of school before she completes her degree. He offers his business card with a possible position with the company. The next scene cuts to 4 years later, where Andrea's & Chris's (or Williams) son is running into the diner, who clearly looks more than 4 years old.