I recently developed a workbook with two worksheets. The second sheet, has a chart that I want to appear on Sheet #1 as well. However, whenever, I select and copy that chart, the copy completes, but it simultaneously deletes the other worksheets in the project. I can recover the original by saving the trashed workbook under another name and then reopening the originally-named workbook, but that makes me enter a lot of new data all over.

This appears to be flagrant bug in Excel for Mac, but I can't find anything about through Internet searching.