Statistics for Top Voices are refreshed each day and are indeed correct. However many have misconceptions about how they will show up. Top Voices does not take into account the location you've added to your profile. Top Voices only takes into account questions that you've answered that are categorized within that specified area. By the looks of it you currently have only 1 best answer for a question that is categorized in the New York area.
I hope this clears things up. If not let me know.
Customer Service Representative