While Alexis is getting ready for her first date with Tank, she had a margarita in her left hand. Her roommate walks toward her with a leopard-print blouse. Mid-sentence, the camera angle changes, Alexis is wearing the leopard-print blouse and black scarf, and the margarita is in her right hand.
Towards the end of the movie when Tank catches up to Alekis in the park running, she takes out her headphones to see who is calling her name, once she realizes it is Tank she puts her headphones back in. In the next shot her headphones are hanging around her neck.
When the first of Dustin's eyebrows is shaved off, it is clear that he has prosthetic makeup over the area, as the ridge of that eyebrow is suddenly quite a bit lower than the ridge with the remaining brow.