Other mistake: When the wild hawk flies over and soon lands on the green painted chicken box, not only are different birds of prey shown in these shots, their flight feathers are also intact. When Zeb and Jim-Bob walk over to the bird, it's apparent that this hawk standing atop the box has the primary feathers clipped on its left wing. (00:31:00)
Other mistake: After John-Boy leaves, in the last scene we hear Jim-Bob ask about the magazines, but subtitles claim it is Ben who asks, then as we hear Jason answer the question, the subtitles tell us it's Jim-Bob who answers (on Warner Bros. DVD). (00:47:00)