When Detectives Briscoe and Logan arrive to arrest a suspect in a hotel room, they clearly enter room 208, but moments later, when Logan calls for an ambulance, he says they're in room 512.
The detectives knock on door 208 of Lowery hotel but when the detective makes a call, he says room 512.
During Mr. Stone's examination of a witness, the defense attorney objects to Mr. Stone's question, and the judge upholds the objection, yet the witness is allowed to answer the question. The judge should have prevented the witness from answering, and if he had answered anyway, the judge should have immediately instructed the jury to disregard both the question and the witness's answer. However, in Schiff's office afterwards, Kincaid says that the entirety of their cross examination was inadmissible because the judge did, in fact, instruct the jury to disregard all testimony.
When Briscoe and Logan go to the hotel, they get out of the elevator on 14, and go into room 1407 (on slow-mo), which is the right room allocation for the 14th floor (not as mentioned before any other room numbers).