The arms on Steve's 'practice girl' switch from one side to another throughout the episode.
When Stan is singing the Oliver North song, it shows Oliver North wearing a uniform with General stars. Oliver North was a Lt. Colonel at the time of Iran Contra. It also shows North saluting with his left hand. The salute is always executed with the right hand.
When the kid was reporting about the freeway accident he said it took place on "The 395". The only people who put the word 'the' before freeway numbers are in Los Angeles where the writers of this show are based.
When the Smiths' are at the Jefferson Memorial, the scene pans to the Washington Mall where the Washington Memorial and Lincoln Memorial can be seen. The Jefferson Memorial is on the other side of the Mall, sits farther away across the Tidal Basin, and is between those other 2 memorials.