Thanks for the suggestion, but that doesn't seem to be the problem. I can't really find that in the customize window. It's like the whole group is duplicated and I don't see where you can add or remove sections of the command mgr.
Before you do any of this you might want to save your settings in case the toolbar gets messed up.
If you right click on the toolbar, then at the very bottom of the menu there should be a "customize" button.
If it isn't there then try clicking "Customize Menu" and then check the box next to "customize" at the bottom. Then you can right click on the bar again and the "customize" option should be there.
Once you have clicked "Customize", the Customize window pops up, but if you ignore that and right click on an icon, you should get an option to delete it.
I don't know how that happened, but you should be able to right click anywhere on there and pick "Customize", then right click on each duplicate icon and delete it.