I had this problem and it ended up being an issue with isboxer. I ended up deleting the team and remaking it using the wizard.

Another thing that can cause this is logging toons into the "wrong" session of WoW. Alt-tab between the wow windows and ensure that you logged in the proper toon into each wow. Logging the wrong toon in when first setti up the team and checking the 'remember account name' box at the wow login screen will cause this mistake to repeat every time you launch the team. If you logged FTW into the wrong session, you can fix it by logging FTW into e proper session.

To clarify: Isboxer will think ToonA is logged into wow session one but you accidentally logged ToonB in. This will screw up things with jamba, especially with regards to follow and master.

If you alt-tab through all five wows and have the correct toon logged in to each one, i would delete the isboxer team profile and make a new one using the wizard. Take special care logging in the first time. Once in the game, open jamba. Go to profiles. Load a profile on tge leader's account that you know actually works. Go to the team tab. Delete the five members from the profile you loaded. Add (by typing their names) the other four toons you actually want in the team. Make sure under Tags you have Master showing up only on FTW (or whatever the leaders name is). Now use the invite button on the team tab. Go to the main tab of jamba and press the Push all settings button.

Switch to any other members wow window. Switch back to the leader. Everything should work now.