Apple Health Data Priority - Reverts Back to put Apple Watch First

Hello ktjhayes,

Thank you for using Apple Support Communities.

I understand that when you reset your Health app data priority, those changes are not sticking. I would first recommend taking a look at the following article on prioritizing data sources. Review the information and make sure that you are following theses steps.

"Prioritize data sources

Here's how to choose the sources that Health uses first:

1. Open the Health app, then tap the Browse tab.
2. Tap a category, then tap a subcategory.
3. Scroll down, then tap Data Sources & Access.
4. Tap Edit.
5. Touch and hold the Change Order button  next to a data source, then drag it up or down in the list. 
6. To turn off a data source so that it doesn't contribute any more data for that category, tap the checkmark next to the source.
7. Tap Done.

If multiple sources contribute the same data type, then the data source at the top will take priority over other sources. Any new apps or devices that you add go to the top of the list automatically, above your iPhone or iPod touch. "

Manage Health data on your iPhone, iPod touch, or Apple Watch - Apple Support

One thing to take note of is that a new device will go to the top of the list, this might be part of the issue.

Best regards.