Continuity mistake: When Porky and Charlie go to the desert for their picnic at the end of the short, Porky sets up the picnic and plays "Fetch the Stick" with Charlie. Charlie then leaves Porky and when Porky rushes to his car after Charlie drives off, there is a trail of sand behind him. But after a quick cut to the car driving off, we return to Porky and the trail of sand has now gone.
Continuity mistake: When Porky puts the "To Scotland" label on the mailbag, there is nothing on the top right hand corner. When Porky puts the mailbag on the hook on the Mail Post near the railway line, two stamps have suddenly appeared.
Continuity mistake: When Charlie Dog drops his bone on the ground after his master leaves him, the bone is lying horizontally. But a couple of shots later, the bone is now lying vertically.
Continuity mistake: After Porky ties up the mailbag with Charlie Dog in it, he is holding the bag vertically, and puts the label "to Scotland" on it. When Porky goes in the house, Charlie is standing by the bag which is lying horizontally, and the label is affixed differently.