In the episode "Gooey Chewies" Andy was invited to Lori's birthday on April 1 first which would make her astrological sign Aries, but in the episode "The Fortunate One" where Andy became the "Anonymous Astrologer" for the school newspaper, it was stated that Lori was a Scorpio, but Scorpio is October 23 -November 21. Oops looks like the writers can't even remember an episode that THEY wrote.