Have you got a workbook that you can attach so that we can look into this?
What is the ultimate outcome you are hoping to achieve as well?
This certainly seems strange, but it is difficult to troubleshoot without seeing a screenshot or a packaged workbook.
All that being said, have you considered a different chart type. Pies have lots of limitations and they are incredibly difficult to read when you have more than just a few slices, particularly when some of those slices are very small. Take a look at the following for some good alternatives:
thank you...still exploring...
Any further questions on this, Mark?