Comment 44 for bug 902852

AllenS: you can try setting autologin-session=XBMC to see if it fixes the wrong session problem. About the short timeout, I think that the timeout starts when lightdm starts, and it starts the greeter afterwards and on slower computers the greeter may not have enough time to get to presenting the login screen before the timeout is reached.

To let everyone interested know, I filed bug #1122890 about timed autologin not working after logout from a session. The missing visual indicator is not critical for me, so I won't be filing a bug about that.