Janna's Zephyr(W) range problem

As the description (http://gameinfo.na.leagueoflegends.com/en/game-info/champions/janna/) of her skills, her Zephyr should have a range of 600, however in the game play, her Zephyr has a relatively short range and just a little bit longer than her basic attack range(475). Please fix the range problem and I have a screenshot of her Zephyr range. (In the photo, the shorter range is her basic attack range while the longer one is the range of her Zephyr, it can show that Zephyr really has a short range.)