During Cooper's rock throwing scene, each 'J' character flashes up on screen momentarily as he mentions their name. However when he mentions Johnny Horne, the footage is lifted from the pilot featuring original actor Robert Davenport in the role, even though the new Johnny Robert Bauer had been introduced this episode.
In the rock-throwing scene, the letters "R" and "T" go from uncircled to circled between shots.
When the Horne brothers go to the One Eyed jacks by boat, the scene is running too fast, visible when you observe the movements of Ben . Matter of fact it is not a real goof as David Lynch liked to protect natural environment by shooting scenes like this slower as needed just to speed them up later.