Hello, I’m looking through my stats on Halo waypoint and for the past week I have been playing reach alot and whenever I check my reach stats it says I need to purchase the game and then play. I have signed up on Halo Waypoint with my Xbox account.
Any answers will help 
Have you tried this thread?
https://www.halowaypoint.com/en-us/forums/8f4648981f554a9d86527a5754966e89/topics/legacy-stats-not-updating-on-waypoint/ccfffa7a-457c-432a-9b4a-6b885effef2d/posts
Thank you I have sorted the problem