Hi wynhodgkiss ,
We have reported similar issues to the product team in the past and we got the following response：
”This behavior is expected: if the top-level data label toggle is enabled, all series get data labels. If the customer only wants one series to be labeled, they need to subsequently disable the labels for all other series.“
This may seem a bit complicated, but for now, the only workaround is to manually turn off the other labels like in the image below：
If you would like to suggest feature improvements, you may vote the idea and comment here to improve this feature. It is a place for customers provide feedback about Microsoft Office products . What’s more, if a feedback is high voted there by other customers, it will be promising that Microsoft Product Team will take it into consideration when designing the next version in the future.
Best Regards,
Community Support Team _ Caitlyn