Talk:Battle Arena/@comment-24482752-20150620171504

Is there a typo on this page? Under the dragon categories section, for rare, it says "except for the exceptions in the Common and Unbreedable    tier, dragons that the game displays as Rare will be classified in this tier."

Dragons aren't classified as both Common and Rare though (I understand how they can be both unbreedable and rare). Is this a typo, and can someone explain that rule to me?