Dresden prepares his crystal to backtrack Jennifer Randall. Then an aerial view looking at 405 N Wabash Avenue Apartments has the caption "Jennifer Randall's apartment 5:28pm".
But the Wrigley Building clock is visible, showing 7:30.
When Harry dives into the cellar and charms the trap door shut, he then motions each bolt and they're heard snapping home. But in closeup the bolts are still open.