When Jenna enters her office she throws her silver bag on a chair, and as she walks over to the photos you can see the bag is laying on it's side. When the woman knocks on the door you can see the silver bag again, but now it's standing upright, as you can tell by the straps/handles. See more...
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13 Going On 30 (2004) - 2 with pictures
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Continuity: When Jenna first walks around after turning 30, the camera pans around the apartment and we get a good view of the small glass table in the lounge, and there is a remote control next to a magazine. When Jenna goes and sits on the yellow chair though, the remote is now on the magazine. Later when Jenna is throwing her letters, the remote has moved to its original place.