This seems to happen when a user logs onto a PC and launches Excel 2003 for
the first time. When I go into customizing the tool bar, the item that I
wanted to add to the toolbar in the first place, appears (i.e. Sort
Descending). Since it looks like it's already on the toolbar, I click Close.
That item disappears and is not on the toolbar any longer. So I go back in
and add the item to the toolbar so that now it is displayed twice (also shows
twice after clicking Close). Then, I'll go back in and delete one of the
duplicated items and when I Close, either both will disappear or just one
displays (as desired).

Is this a bug? Has someone else experienced this? Is there something I
should be doing differently?