in the warehouse, there is a gas leak. Ben says "Go outside I will go to basement to the shut off values." in commercial buildings the gas shut off are outside the building.
The reflection of 109 would not look like 601. It would look like 901 with the 9 facing the wrong way.
Tarik says that Cal is 12. Because of 828 his body is that of a 12 year old he would actually be closer to 17 years old.
When Olive is telling the guy that was working for Ben that she knows more than just Instagram she says that she could right a dissertation on Al-Zaras who she claims was European. Every other time he's mentioned they say he was Egyptian.