Does Zeitgeist by language update a few counters only?

Hi! I watched http://www.librarything.com/zeitgeist/language/epo since saturday when we where all happy about the new http://www.librarything.com/ subdomain.

I noticed that the "Members:" counter increased to 10.
Some days before I have added a dummy review using Esperanto. Since then I waithed that my name should apear somewhere on the list.

Why should counters update?
It seems that both Top books and Top authors are calculated on the basis of a few libraries only (belonging to users registering a while ago).

Maybe the procedure how to be listed at "Zeitgeist by language" subdomain is not clear for many users.

Is it triggered only by the "Primary language" parameter at /editprofile/account or also by individual reviews.

Should it be possible to select multiple values for a renamed parameter "Primary language" ? I wold like to keep Yiddish as primary and to have Esperanto as second.

Thanks for any feedback!

Note: The counter at Zeitgeist by language for Esperanto (now 9) differs with the one from the one at Members: (now 10)