Continuity mistake: In the scene where Gia tells her mother to get out of the apartment, Gia's mother sets her luggage down in front of the elevator and presses the button. The next shot shows a close-up of Gia crying, then the camera goes back to Gia's mother in front of the elevator again, only this time her luggage is in a completely different position. It doesn't seem possible that Gia's mother would have had time to rearrange her luggage in such a short amount of time.
Continuity mistake: When Gia's mom is leaving the apartment Gia starts crying telling her to stay so her mom hugs her. The camera angle from the back shows the mom's hand near the center of her back at the bottom of Gia's neck. The camera angle from the front shows her mom's hand on her shoulder. This happens about 3 times during the entire scene.