Achievements unlocked, but uncounted

Last night I went into Halo 2 campaign to check which levels I had completed on which difficulty settings. A slew of a dozen achievements popped up all at once. I had not earned any of them. Of the twelve that popped, only three added to my gamerscore, but
all show as unlocked (down to the same minute).

Now, I have played all of these levels, and "beaten" them - with non-scoring skulls active. So at the time of completion, these achievements were disabled because of skulls used, and something has since gone wrong where the game no longer correctly
locks these achievements based upon that stipulation.

However, in some incredibly strange manner, a secondary glitch has occurred because of/following the first set. Before this event, I had seen my gamerscore blip up on the homescreen, and noted that it was 41,110. I thought it was a fun number, and it stayed
in my mind for a bit. Now, I don't recall if that was after the last legitimate achievement I had earned or not, but it's enough to realize something has gone wrong. When these all popped unexpectedly I was curious what all I had earned and checked. 12 achievements
worth a total of 180G. My gamerscore rose to it's current 41,160. It should have increased by 180G, but actually increased by only 50G.

I have no way of knowing for sure which were added to my gamerscore, but I suspect the first three. It makes sense that the system would begin correctly, and then only because of the sheer size of the onslaught get confused. The first three to unlock were worth
50G together (30,10,10). The final three add to 40G, and the fifth would push that over to 70G so it wasn't counting properly by that end.

Just to be perfectly sure I'm not imagining things, I counted all the achievements for MCC (thank you spreadsheets ignoring text values in the sum function).

Earned | Remaining

Listed: 2755G, 324 Achievements | 2245G, 176 Achievements

Actual: 2885G, 324 Achievements | 2115G, 167 Achievements

Off by: 130G, 0 Achievements | 130G, 9 Achievements

TL;DR: Achievements earned in Halo: The Master Chief Collection when unlocked may or may not add to one's gamerscore.

List of unmerited but "earned", unlocked but (partially) uncounted achievements from this glitch:

:)

 

Achievements unlocked but ... not unlocked?

Hello,

my suggestion is to follow the advice of chat support and contact EA for only the game publisher can assist you at this point

 

Achievements unlocked but ... not unlocked?

I got problem with my account. I started latest battlefield 4 DLC and achievements on my console are unlocked (not all yet but its not important) but xbox.com and other websites tracking achievements wont see those achievements. My console says i got 58/62
battlefield achievements but when i check list of achievements i got only 2 achievements undone. Thats not all. Those 2 achievements missing on website are for 40 gamescore but difference between gamerscore on my console and xbox.com is 70 gamerscore. What
can i do to get it fixed ? I was contacting with chat support but they were saying i should contact game developer. Its sounds funny because its 100% microsoft services issue. HelP!