Factual error: Waterloo County Fair labeling shown at least twice. Waterloo is not a county. Black Hawk is the county and Waterloo is the city in Black Hawk County.
Factual error: When the militia come in to shoot Woody, they're holding pump action shotguns and you hear them pump them (meaning chamber a round so it's ready to shoot). Even if we assume Malloy and Jorge did not do this, we see/hear them both pump the shotgun twice (without ever shooting in between). However, pumping the shotgun after a round has been chambered will eject the round, in the case of Malloy and Jorge an intact round, not just the shell, would be ejected. However, we never see anything be ejected.
Factual error: When Susan is sorting Ruth's things, she finds Gordon's iPhone wrapped in a newspaper from 1994 with her voice-mail to him and realizes he went back in time, where Ruth killed him and took the phone from his corpse. Even if the phone had been turned off, after 16 years idle, the battery would have died long ago, but we see the phone is on with her message waiting. (00:55:50 - 00:56:45)