@GlennM1630 Thank you for trying IE mode!
1. If you set the GPO to enable IE mode, the flags will not be set.
2. We had a bug with IE mode on Win 8.1, which has been fixed as of the latest Dev channel update (268.3). Please let us know if you're still experiencing an issue.
3. For the site list to refresh, you will need to restart the browser and wait 60 seconds for the changes to be reflected on edge://compat. We are working on a better experience for this. Stay tuned!