Continuity mistake: When Schaeffer and the bad cops approach the Amish Farm, it's late afternoon/early evening. But when Samuel runs to the Hochleitner farm, and when the other Amish come running, it is mid-day or early afternoon.
Suggested correction: I always thought Shaeffer and Co arrived at dawn, not dusk. Workers could have been in the fields a bit later when the bell rang. But the morning does seem to brighten quickly.
Factual error: The car John Book was driving was a 1971 Squareback Volkswagen. They were "repairing the car" under the hood, but the engine on that model was in the rear.
Suggested correction: It is never specified that they were working on the engine. They could have been working on the brakes or the steering, both accessed via the bonnet/hood.