Continuity mistake: Hannah enters the bar wearing a University of Texas hooded sweatshirt with its unmistakable school color when she asks Charley to take her to see her father. When they arrive at her father's house, she is wearing a plain dark sweatshirt.
Revealing mistake: Hannah sits in a conference room and pulls a landline phone towards her to dial her friend, asking about the will Owen left. The phone however isn't in any way connected, hence no call could have taken place.