Thank you for mentioning this! This should be corrected now.
A bit of background information:
While Perlmonks stores the votes on a node in a separate table, it also caches the vote count on each node directly. This of course means that the entries in the votes table can go out of sync with the cached vote count on the node. There is Call for a Recount (gods only] (to be found via Gods' Arcade, also gods only) to update the cached vote count for a single node or multiple nodes. One needs to uncheck the noupdate checkbox to actualy perform the recount.