It might actually have to do with this. The number on the dashboard is the number from the dnsmasq parser. If you have both IPv4 and IPv6 blocking enabled, then you have two times the number in th hosts lists. In this sense, the display on the dashboard (number of loaded blocking entries) is clearly different from the number gravity shows (number of unique domains).
@mibere What do you think would be a good way of handling this?
P.S.: I'll separate this discussion from the FTLDNS post.