Angel wears a ruby necklace in the party, but it disappears and reappears on her neck throughout the coffee shop scene.
The establishing shot of the party house shows a single story house, while inside we see Angel and Ashley standing in front of a staircase.
The Beer Bong scene shows two C-stands on either end of the room holding up the cords to the lights that are scene in the scene, also a grip can be seen in the near corner holding on of the stands up.
In both the coffee shop argument scene, and the scene where Angel and Russell first enter the kitchen, a folding chair that was accidentally left out by the crew can be seen.