Microsoft Excel Interview Question:

I have an Excel file that I use every day at work. Some time ago, mysteriously, the file began opening two copies of itself every time I double-click the icon. If I close one of the copies, both close. Any changes made to one copy show up in the other?

Submitted by: Administrator

This sounds like you just have two windows open that are displaying the same workbook.

Select the window that you want to close, and press Ctrl + w

OR, you can close the extra window by clicking the lower of the two X buttons in the upper right corner of the screen (don't click the top X button, as that will close Excel). Then save the workbook.
Submitted by: Administrator