Achievements popping , adding to gamerscore but not showing as unlocked

Same stuff happened to me yesterday. I unlocked an achievement in Red Dead Redemption on Xbox 360, it popped on the screen. When I look at the list of games, it shows I unlocked 71/95 achievements in the game, but when I click on the game to show all achievements
in it, it shows 72/95. Interestingly, as soon as it unlocked, I opened up the list of games and it was correct, but after a minute or so when I checked again, it was messed up. Similarly, it's not added to my gamerscore too.

This still doesn't seem to have been fixed properly. I unlocked the "Overachiever" achievement in Sunset Overdrive, but the gamerscore for it has never been added to my total gamerscore.

- My total gamerscore is showing as 46960, but it should be 46970.

- I see my total gamerscore displayed wrong on xbox.com, the Xbox One achievement app and on my Xbox 360.

While I'm in the achievement app it tells me for Sunset Overdrive I have 40/1325 GS and 2 achievements. When I click on Sunset Overdrive in the achievement app, it says the same, but under "your achievements" it shows me that I unlocked 3 achievements: "Oh
the Horror!" for 30GS, "Overachiever" for 10GS, and "The Floor is Lava" for 10GS, adding up to a total of 50GS.

I'm very sure that the missing 10GS come from the "Overachiever" achievement, because that one never popped up, and I unlocked the "The Floor is Lava" achievement after the problem occured.

This has been ongoing since the 4th of February now, and I would really appreciate if this gets fixed soon.

This still doesn't seem to have been fixed properly. I unlocked the "Overachiever" achievement in Sunset Overdrive, but the gamerscore for it has never been added to my total gamerscore.

- My total gamerscore is showing as 46960, but it should be 46970.

- I see my total gamerscore displayed wrong on xbox.com, the Xbox One achievement app and on my Xbox 360.

While I'm in the achievement app it tells me for Sunset Overdrive I have 40/1325 GS and 2 achievements. When I click on Sunset Overdrive in the achievement app, it says the same, but under "your achievements" it shows me that I unlocked 3 achievements: "Oh
the Horror!" for 30GS, "Overachiever" for 10GS, and "The Floor is Lava" for 10GS, adding up to a total of 50GS.

I'm very sure that the missing 10GS come from the "Overachiever" achievement, because that one never popped up, and I unlocked the "The Floor is Lava" achievement after the problem occured.

This has been ongoing since the 4th of February now, and I would really appreciate if this gets fixed soon.

I was playing the new Sherlock Holmes game and i unlocked an achievement, but it didn't pop. I checked the progress and the green bar was full and it just said "achievement unlocking". It said that for about 2 days and the last night when I played the game
again it was unlocked and added to my overall gamerscore.

I think you're getting the gamerscore just xbox is delayed and slow

Sometimes they will pop though as soon as you get them , sometimes its a day later

they come through on my laptop but not on my xbox console then 5 minutes or 1 hour down the line it will randomly show it

Just check unlocked achievements it will be adding its just not giving you notification for it , so you are not loosing the gamerscore your just not realising its adding it