On xbox waypoint it says I’m level 73, with 6k achievement points across Halo.
Although on the site, it only says I have 3.6k and I’m level 47.
Is anyone else getting this issue?
https://forums.halowaypoint.com/yaf_topics22_Halo-Waypoint.aspx
Post there in the future please 
It is a common/known issue and is being worked on.