How is the treasure from season two?!

Season two premiered in August 2012. I remember seeing the episode on TV when I was still in elementary school from September 2007 to June 2012 and even rewatched a clip off a computer at school after having already seen it on tv. I remember vividly remembering every single line from the episode when I went to visit family overseas from July 2012 to September 2012 alongside various other episodes from the time so naturally, I thought it was from season one so when I came to find out that it’s from season two, I’ve been completely flabbergasted. does anyone know how this is possible?