Yorick bugged?

Did an ARAM with my friend who was . The damage dealt table says he did 546,000 damage. Is this a bug with or just the damage table? He got reported by two people for hacking even though he wasn't.

EDIT: Figured out what it is. When the Copy from Yorick's ult dies, it does 100k true damage to itself (but applies it to whichever champ was ulted on the meters). Just a bug in which it is displaying when it shouldn't.