I’m adding items to a course, and suddenly all other people have some points this week (which should not happen, as the week just started one hour ago GMT), but for me. As it happens, I did make some 6000 (???) points last week…
not everybody is in the same time zone
well, the most of them are Germans/Austrians etc… that has some tiny consequences regarding the time zone, not for all of them, for sure,but for one or two or three?
Was it maybe just a glitch? Just looked at your course and on my screen it looks like this:
Who knows what all the jellyfishes swimming around soon did to the leaderboards on their way … 
it also takes some time before all information is put down correctly again at the beginning of the week