Achievements Glitched out of control

Having a MAJOR issue with achievements which has left me and the xbox customer support team left with no clue what to do. Basically every time I unlock an achievement it fluctuates between either not adding any score to my overall gamerscore or more ridiculously
REDUCING my gamerscore.

At my last estimate I am currently about 700G down on what I should be at and have no clue how to fix this. Contacted support multiple times and was basically told 'ehm we dont know what to do, hopefully it updates, if not your ***'.

I am fully aware that sometimes achievements don't unlock instantly and can take up to 72 hours to update but this is a whole other issue entirely and would like to see if anyone else has this issue and if we can get a fix or workaround asap.

:)

 

World of Tanks

Controls glitched out on me couldn't control my tank it had a mind of its own

 

y wont the achievements unlock for me(spoilers)

I know there is a glitched achievement called "Complete Blackout" which requires you to destroy all of the satellite uplinks. Mine unlocked after I destroyed 22 out of 24 uplinks. For others it unlocks at 23. That achievement of yours might also be glitched.

 

This has happened to me all day today, I thought it was just my account, o completed D4: dark dreams don't die today and my gamerscore was being reduced, any ideas to fix this or is it a xbox fix

 

I've heard people saying that if you unlock an achievement on the 360 it can correct the score but as of yet I haven't tried that, I was also asked by customer support tonight to change my avatar on xbox.com by adding a hat or clothes and that would push
through the most recent version of your profile to the server but i'll need to wait on that one aswell.

 

I'm having the same issue. my gamescore reduced after adding on about 500

 

Ok after finally booting up my 360 after what feels like a decade I can confirm that by unlocking any achievement on the 360 it fixes the glitch and shows the correct score both on the 360 and Xbox One, not a permanent fix but atleast a workaround for now.