In the rock-throwing scene, the letters "R" and "T" go from uncircled to circled between shots.
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.
When the Horne brothers go to the One Eyed jacks by boat, the scene appears to be running too fast, visible in the movements of Ben. However, this is an intentional editing choice by David Lynch, who liked to protect the natural environment by shooting scenes like this slower as needed just to speed them up in post-production.