Trivia / Sailor Moon Ep 46 Usagis Eternal Wish A Brand New Life

• Word of God: This article has the anime creators confirming in a Japanese magazine that time was reset a year thanks to Usagi's wish, explaining why she doesn't enter high school until Stars while in the manga she entered during SuperS.
  "Why isn’t Usagi a third year in junior high school yet?
  To which the following answer is given:
  Normally, she would have definitely moved up a grade, but since she was once again reincarnated prior to April, she’s re-doing her second year of junior high. She didn’t flunk out, really!"