This behavior can occur if the following conditions are true:
- In Microsoft Office Excel and in earlier versions of Excel, you click Replace or Find on the Edit menu when multiple, but not all, worksheets are selected.
In Microsoft Office Excel 2007, you click Find & Select in the Editing group on the Home tab, and then click Replace or Find when multiple, but not all, worksheets are selected. - You specify Workbook in the Within box on the Replace tab of the Find and Replace dialog box.
Under these conditions, all worksheets in the workbook are searched for matching cells. Therefore, all matching cells are replaced.