So I played Halo 3, ODST, and Reach on my 360. I just got Reach again to play on my Xbox One, and. I decided to look up my account. However, my account is completely missing from here. My gamertag used to be Yash The Fraggr. I ended up changing it to BrownManYash a couple months back. Could the name change cause this?
Yep you caught it OP, your stats will still be tied to your old gamer tag. If you play each of the games on your new tag (if possible) your stats should sync up shortly after. Need to be connected to Xbox Live when you are playing