Changing charaters/sets without relaunching instance of wow?

[mbox_bob]

At the character select screen, the Addon should not be loaded, or at least it may not have reloaded the correct version of the addon depending on what order you do things. Order is important.
You should try by camp out to the character select screen for all games, load the new ISBoxer team there (right click the InnerSpace icon, select ISBoxer Character Sets, name of your new set), and then back on the character select screen, select the correct characters for that team. Once loaded into the game, if you still get that message, then it usually means the characters are actually in the wrong slot, which may stem from the fact that you haven't got the slots in your character sets properly aligned so that Slot1 is always characters from AccountA, and Slot2 is always characters from AccountB, etc.