The pictures of young Josh being followed by the woman in black are different from the ones in the first film.
When Dalton and Chris return to the frat house and Dalton goes into the further, he sits on the floor leaning back against the wall. In the next shot he sits bent forward with his head hanging down, in the next close-up shot again leaned against the wall, followed by another wide shot sitting bent forward.
When Daltons dorm loses power, his fan is still running on the dresser.
The angle of the selfie Dalton and Chris, the photo differs from the shot taken.
At 40:25, Chris leaves Nick's dorm room out of sight, and hear the door close behind her. The next shot shows Dalton, and see the door close to his right with no sound.