When Kaya-in-the-Skya is first accessing the operations building, the picture displayed showed her disappear from the screen before they put in in loop.
When approaching the door, the series of numbers shown on the screen are "17,19,21,23,29" and they are supposed to key in the next number in the series to unlock the door. Citizen Z says they are a series of prime numbers. 21 is NOT a prime number.
When Warran taps on the pole with her gun to attract the zombies the gun doesn't actually make contact with the pole but still makes noise.