Excel 2013: Insert Worksheets (3 Instead of 1)

When I right click on a tab and say Insert/Worksheets I'm getting 3 sheets added every time instead of 1. The only Excel option I see in this area is "Include this many sheets" when creating a new workbook, but I have that specified to 1. In previous versions of Excel it only did 1 sheet when I did an insert. How do I get 2013 to only insert 1 worksheet?

No, but I finally figured it out. I had some old templates in my XLStart folder. There's no telling how long they have been there because they were from 2011. I deleted them and all is fine.