Other mistake: Jack follows J. Edison Nash to a wine warehouse and watches as Nash punches numbers on a keypad in order to gain entrance to a private room. Nash punches the 6 and a beep is heard. He then punches the 8 and another beep is heard. During a close-up of Jack, four more beeps are heard, for a total of six. Jack says the number out loud - 862, which is only three digits.
Musings of a Cigarette-Smoking Man - S4-E7
Other mistake: When the CSM is aiming at the door, it must be quite difficult for him because it seems that he forgot to take off the protective lid from the night vision rifle sight. (00:35:10)