The flowering trailing arbutus vine is missing off the Waltons' righthand front porch column.
The movie that Elizabeth, Aimee and Jim Bob were going to see is stated as Jane Eyre. If the timeline of the Walton's episode is 1942, then they could not have Jane Eyre at the movies as this movied didn't premier in the USA until February 1944 (in New York.),
Jason jokingly says that he will put Ben and Jim Bob in the brig. He is in the army so the prison would be called a stockade. A brig is what the navy calls their prisons.