Most likely, you, or someone before you, Shift-clicked when selecting a
sheet tab, and all sheets from the current sheet to the selected sheet,
and all in between were selected.

You didn't notice the "[Group]" in the title bar.

In article , "dennis"
wrote:

Thanks for the tip; I tried this and it fixed things right up. Don't know
what caused it or why, but I'm glad I didn't have to re-write it.