After giving a user author status, I can no longer post as the admin and am forced into publishing posts as the person I gave authorship to. If I demote them to a subscriber, I can post again though. Also it only happens with this one user. I've been able to grant authorship to another user before, so it seems to be a new problem.
I really don't know much about coding, so I don't know what else I can say. My site is here if it helps: http://www.gingerkisses.net/wordpress/ (PG13-ish so probably not terribly work safe)
EDIT: I can't make anyone else a contributor, editor, and etc... either. It seems if I assign more than 1 person to anything higher than a subscriber role, I lose my ability to post as the admin.