Hello,
I do not understand I play almost every day FM6 and for three months my gamerscore stuck on 188/500 PTS.
Also in FH2 stuck.on days played 420/500 PTS played almost every day.
Wirtten move to tier 7 unlock more achievements in FM6.
I just unlocked the new 9 achievementes but gamerscore is still 188/500 PTS
Someone has similar problems , how to solve ?
Are you connected to online the whole time
Also gamerscore wont update immediately
Could take a few days
Other stats can take up to a month sometimes too
Those stats will only update if connected to online too
Try a proper hard reset of your console too
The Rewards program is awful - my achievements have also been stuck for months (and yes, always online, hard reset, etc). T10 need to fix it or dump it.
Thank you for your reply 
My console is always online.I’ll try to play fm 6 apex … If it still be the same , I do not know what I’ll do…