Had service done at about 68,000 miles by the dealer and the service indicator dropped from 9,850 to 3,000 about a week afterwards. Has anyone else had this happen or know what could have caused it?

The inspection report showed the brakes at 2mm but they were 6mm when I took them off myself so I'm wondering if they actually did anything.

This is a 2015 F55 S.

Edit: No idea why it shows R55 in the title or how to change it.