i use jamba and isboxer and have a similar problem when switching to a different team. i close down all windows, and use isboxer to load a new team but in my jamba team list, i still have the previous team's names. Its no biggie, just Remove 4 old names and Push to All.

Gonna try deez's suggestion though. Doesnt matter if i have a long list as long as i dont dont get spamed USER1 NOT ONLINE 4 times.