When Eric picks up a pistol from the video box to answer the door, it is one with a rounded trigger guard yet when he gets to the door, the pistol has a squared and larger trigger guard.
When Samira starts to malfunction and "turn bad" after killing Hussein, she has flashbacks of previous events through her memory system. However, these flashbacks are presented to Dr Brock and the technicians as "live feed" through her surveillance system (as if looking through her own eyes, with what she sees being what they see), and several of the flashbacks are shown from the actual camera angles of the film, in third person, rather than through Samira's eyes/cameras, which is impossible.