Career Milestone Incorrect

When I went into waypoint today my career milestone was much lower then it should be, then again later in the day it went all the way down to zero.

p.s. also waypoint locks up my xbox whenever I attempt to access it from Halo 4

It is a known issue and being worked on.

As for Waypoint locking up your Xbox when you launch it from Halo 4, I get the same issue, there is no fix sadly.

This happened to me as well.
Except it only lowered once so far.
I was milestone 43 before I got the new Halo Waypoint update today,now I’m LEVEL 25!