Around 25'20, Philip show Elizabeth a joint he's brought back from Kiberley's: it has a rolled end. Then, when they open the window to smoke it (26'), it doesn't, and looks more like a cigarette.
When Stan's new partner talks to Martha about the office post robot she is opening the robot as if to retrieve something but he then approached Stan and whilst you can still see the top of the robot Martha has disappeared.
Paris poster in Paige's room moves up and down in different shots during conversation with Philip (Paige's dad).
When Kimberly kisses Phillip after she comes out of the shower (21'43") a crew member is visible moving out of the bathroom.