Why don't you take it up with Sushi, then? She translated it.
Are you talking about her LJ entry on that episode? She didn't translate the lines as that, she simply said it seemed to imply that Scott was blaming Ash. A closer look at the dialouge would reveal that...he really isn't.
Plus, we know the line is wrong because it contradicts May doing so well and making it to the final round of the Contest in the Ash Vs. May episode.