I have found a Halo Waypoint problem which is about the milestone. I already had 59
milestones and today when I got in to Waypoint I had only 45. I reload the Waypoint to be sure that it wasn’t just a bad load but it happened again. Then I entered Waypoint from my pc and I saw that for some reason I had only 32 achievements unlocked on every Halo game with the exception of Halo 3 which I had 24 but this was normal because I didn’t had unlocked anything else in Halo 3. The achievements I originally have are Halo CE 44/44, Halo 4 76/76, Halo Reach 58/69. I really want this to be fixed. Is anyone else who encounters the same or a similar problem?
Dear Friend,
a lot of people, including myself, have a similar problem.
I hope this answers your questions.
Best wishes and kisses,
Vanillae
343 is already working on it… Please see this main post, it has almost 7 pages and admin has already addressed the issue. Thanks! 
https://forums.halowaypoint.com/yaf_postst121601_Missing-Achievements-Milestone-Error.aspx
> 343 is already working on it… Please see this main post, it has almost 7 pages and admin has already addressed the issue. Thanks!
>
> https://forums.halowaypoint.com/yaf_postst121601_Missing-Achievements-Milestone-Error.aspx
The reply from the Forum Team in that topic was from over 9 months ago.
> > 343 is already working on it… Please see this main post, it has almost 7 pages and admin has already addressed the issue. Thanks!
> >
> > https://forums.halowaypoint.com/yaf_postst121601_Missing-Achievements-Milestone-Error.aspx
>
> The reply from the Forum Team in that topic was from over 9 months ago.
Woah! Didn’t even notice… I’m sure that they are still looking into it.
How did you not notice the date. And today my achievement score has gone from 212/413 to 0/0. Thanks halowaypoint… thanks…
6 Hours ago by bs angel
“Hi, kidskull51. As you noted, anything that pulls information from the game is currently experiencing issues. We’re working with the Xbox LIVE team to get this resolved, and you can track our updates in the thread The Little Moa linked (thanks for doing that, Moa!).”
12-13 hours ago by Forum Team
“We are aware that the Halo Waypoint website and App are currently experiencing slow loading times. These issues are a priority to us. Please know we are investigating and will keep you updated.”
13 hours ago
"We are still working to resolve the Waypoint site issue, however the problems with the Waypoint app, including the 500 errors, should be fixed at this time.
If you are still experiencing issues with the Waypoint app, please let us know."