Strange AIM message

Yesterday I started getting this strange message on AIM saying my screename was logged in at two places. I got worried someone was hacking it or doing something with it, so switced to a new one. Now I'm getting the same message there.
This is the message -
AOL System Msg (8:08:45 PM): Your screen name (AeroFennec) is now signed into AOL(R) Instant Messenger (TM) in 2 locations. Click here for more information.
Anyone got any idea why I'm getting this? I'm defiantly not logged in at two places unless the 2nd place is someone else. But I didn't even tell anyone else this new screename.
This is the message -
AOL System Msg (8:08:45 PM): Your screen name (AeroFennec) is now signed into AOL(R) Instant Messenger (TM) in 2 locations. Click here for more information.
Anyone got any idea why I'm getting this? I'm defiantly not logged in at two places unless the 2nd place is someone else. But I didn't even tell anyone else this new screename.