With Tab Groups Set Up and Open, Selecting a Tab Set Opens a Complete Second Set

Once I got all of my tab groups set up the way I want them I wanted to be able to simply pull down the Tabox menu list and navigate to the selected tab group. What I get when I select that tab group, is a complete second set opens even though the original is already open. What am missing in my set up that is allowing this to happen? There is a second part to the question about trusting Tabox to be there when I need it. If I close the entire tab group for whatever reason and then go to re-open it making the primary question above irrelevant, can I actually trust that behavior to be consistently reliable? I found I could not trust any of the other tab group managers I have tried except Session Buddy.