There is a scene where Kathy is sitting in a lounge chair and watches her employees walking down some stairs to go out for the evening. On the table next to her is a can of soda with a straw sticking out. The straw is bent and pointing to the left. In the very next scene it is to the right.
In the one scene when it is Barb is walking with a broom while slowly "dancing/ walking" she has it over her shoulder, but as she gets to the room and knocks on the door it is suddenly a mop!
Kathy says she is a senior business major at UCLA. UCLA doesn't offer undergraduate business degrees.
When Kathy is taking a bath and realizes her hands have turned purple, she sticks her leg out of the water to see if it too is purple. You can see that the dye is painted only up to a point just above her knee. The water has dye in it and all skin in the water should be purple.