Right before Hanna exits the store with her mother she remembers that she had forgotten to take off a necklace she had been trying on. When she takes it off she clearly does not re-clasp it, yet when it's shown hanging from the mannequin's hand in which Hanna put it; the necklace is clasped and hanging from its wrist.
Pam knocks on Emily's door to tell her a reporter was at the front door to talk about he disappearance of Emily's body, not Alison's body.
When Aria wakes up and finds the door open she's starts shaking Hanna to wake her up. However, she calls her Jenna instead of Hanna.