Having trouble with Waypoint via the Xbox

Just downloaded the newest version of Halo Waypoint on the xbox so I could check my stats and look into the “Raider” helmet. Come to find out, Waypoint says that I am missing tons of achievements that go towards my Career milestones. Prior to Halo 4, I was sitting at the 75th milestone (every Halo achievement possible). I now sit at the 33rd. This concerns me…

Is anyone else having problems?

-Jupiter

They have been having issues with em. Sometimes it says I am only at 21 milestone, then it’s back to 51 where I am suppose to be. I assume lots of bugs and what not with the updates and new game.