It seems that the Leaderboard hasn't been updated for two days at least for old users. The new ones are regularly added to the list though.
I think I have found and fixed the cause of this issue now. Thanks for reporting it.
The data on the leaderboard should be refreshed about every 15mins. I can't see any old data on it at the moment, can you please give me a specific example of some old data you can see on there? and are you viewing it when you are logged in or logged out?
Yes, the problem seems to have been resolved now. Thanks!
Customer support service by UserEcho