Reporting a bug

When I played halo 3 on legendary first time it said on my player details page ‘’ highest difficulty campaign completed unplayed’’ so I went through it again and finished it today and it still says unplayed as the highest difficult completed. I don’t know why it’s doing this mind you I didn’t have ANY skulls on. So if you can look into this I will be grateful. Thank you

This is apparently a common glitch, I have it as well. The in-game stats for Halo 3 say UNPLAYED. However, your Waypoint stats are synced correctly and shows you have completed the campaign on Legendary.