My leaderboard shows zero achievements

As if by magic, my leaderboard started working today.

I'm having the same issue. The achievements are not showing in the achievement leaderboard.

No, like vast amounts of score disappearing from one’s total GS and individual games showing zero GS earned instead of actual amount. Not tied just to recent achievements not showing up, but also old ones disappearing and the monthly GS leaderboard being
all screwed up.

I used to have about 85k, now for two weeks or so the total has been showing only 53k, and the leaderboard shows I have earned over 8k in GS this month when in fact the total should be only a few hundred.

GP Quests have moved to Achievements for me.

select See all my achievements then it shows in the panel on the left below
Achievements and Gamerscore leaderboard

Question and discussion. Both. How do others feel about the Leaderboards having invalid entries in them?

Players posting scores that show they completed the game in zero seconds, yet are in the top 10 on the leaderboard. Microsoft needs to really need to do some research and development on figuring out how to make save games more secure, so people can't take a hacked save game, and pop all the achievements at once, and also get on the top 10 leaderboards with fake scores. Place it all in the cloud or something and encrypt it heavily, and don't allow any locally saved games on the consoles themselves.