Well, this is weird. I have a gnome with a 12 charisma. I have been running around with Virgil, Sogg and Dante. When I got to the Schuyler's I told Virgil to wait and picked up Magnus. After I left the Schuyler's I told Magnus to wait and re-picked up Virgil. A few days later I stopped by there and saw Magnus standing under the sign. I talked to him and to my surprise he rejoined me. I now have 4 followers despite having only a 12 charisma. Anybody ever have this happen before (not counting temporarily raising your charisma to pick up a follower, followers that don't count like Dog, etc., none of which apply in this case) ?