After reaching the top rank of 130, my total XP was at 3,930,080. Then I entered all the Waypoint glyph codes. That brought my total up to 4,206,196 XP. About a month ago I noticed the 276,116 XP I had received for entering the Waypoint glyph codes was gone and I am back down to 3,930,080 XP. While playing Halo 4 and looking at my specializations it does say I have 276,116/0 XP. I even tried re-entering the codes but it tells me all the codes were already entered. I was tied for number 1 on Halo Trackers total XP leaderboard along with 4 or 5 other people. All of us are no longer tied for number 1. I asked Halo Tracker if something had happened on their end but they couldn’t find anything. So now I am asking the people at Waypoint if they can find anything. I’d hate to learn that there are people hacking Waypoint accounts just to get XP. Please look into it.
I don’t know how to fix your problem but congrats on being number 1, I was number 1 in the UK on HaloTracker for XP at one point.