Las aventuras de Ozzie y Harriet

I really liked the series- a true American Classic. I agree with another poster about Wally Plumstead- he provided many humorous moments and actually carried the series for many of the episodes. I think I recall that there were some episodes where only Wally appeared and Rick was featured at the end in a separate filmed performance of his band. Also, the episodes with Thorny and the situations with Ozzie were definitely the most humorous in the series. Just one thing on your stats as far as appearances for each of the main characters. It says Harriet, David and Ricky each appeared in 172 episodes, where Ozzie was in 171. How could this be, since there were at 435 episodes total?