Hit counter inconsistent

I am Division Director and keep a close eye on the hit counters of all my clubs as one indication of the effectiveness of their PR efforts. However, I have from time to time scratched my head when I find a hit counter today reading LOWER then it was last week. At first I assumed it was me having eye-finger trouble. But now, after 2 month of very careful record keeping I can say for sure that 2 clubs have for sure a hit counter reading that is today 2 and 20-something hits lower than last month. How can that be?

midwaytm.toastmastersclubs.org/
voi.toastmastersclubs.org/

Arlynn

The counter only keeps the data for a limited time and the the old hits roll off. I believe it is a year.