Tour de Pond / Teachers Strike - S2-E18
Other mistake: Tour de Pond: When Arnold and Rex's boats get stuck together during the first round, there are two shots of Sid and Phoebe at the stand. They are supposed to be sitting in their chairs, but they are misplaced too far to the left of them in these shots. This is shown again at the start of the final round. (00:07:13 - 00:08:45)