Corrected entry: When Telly and Ash arrive to the hangars, we see a plane taking off which leaves a tiny line of vapour. It is impossible due to the air temperature near the earth, to condense the air.
Corrected entry: When Ash smashes the window at the Long Island house, it's obviously safety glass.
Correction: A lot of homes built on/near water have safety glass in larger windows to minimalize damage from natural disasters.
Corrected entry: On the DVD, Telly gets arrested by the cops and is handcuffed, but when Ash gets her free and unlocks the cop's car door, she runs away with no handcuffs on.
Correction: The police handcuffed her, but then the NSA took over. The cops (more than likely) took back their handcuffs and the NSA didn't feel the need to put handcuffs back on her. This could have all taken place while we were focused on Ash in his "daughters" room.
Corrected entry: When they arrive at the Long Island house it is day. However when they explore the rest of the house it is suddenly night.
Correction: This is simply time condensation, not a mistake.
Corrected entry: When Telly and Ash hide from the NSA agents in the field, you can see a steady rain falling in front of the agents' flashlights. Although the two lay still on the ground, looking upward, for several minutes, their faces do not get wet.
Correction: It isn't raining, it is dust.
Correction: Condensation has little to do with temperature, it is more a function of humidity. Warmer air will condense as it cools. Picture a bathroom mirror after a shower. As the air cools (hot exhaust from the engine) it condenses out its moisture as it cools (hitting the atmosphere). It's why car exhaust can sometimes be seen even when it's not freezing out, and conversely, may not be seen if it is cold, but dry out. Besides which, the plane taking off had nothing at all to do with the movie, other than it was taking off during filming. If you saw contrails, it wasn't added to the shot, and occured naturally.