I have been added as a Facebook admin to a page for a client, but am unable to use the page as an admin. The invitation appears in my notifications, but the page itself doesn't appear in the list of pages I have access to. And in order to invite me as an admin, the client made himself an editor, and now cannot add any users at all. So we're a little bit in the dark about how to resolve this issue. Has anyone had experience with this?