The heroic character was new, but had you ever used overseer on any characters on that account on that server before? Like Skuz said, Overseer is not character based, it is account & server based. If you've ever used overseers on Selos on that account on another character, and then retired the agents to transfer them with the character, it will keep the high missions that'll be difficult to do with mostly common agents. If this isn't the case, you can ignore that. But it would be interesting to see screen shots of the overseer Quests and Stats pages.