Please try the new build of 5.0RC2,
The server total could be higher than the sum of all vhost as there might be requests does not belong to any vhost, server just return 404, but they are included in the server count.
Same problem persists after downloading and installing latest build. One of the vhosts is for HAProxy to monitor availability so I know that it would be receiving hits. If I switch back to 4.2.14 then I do see the hit request count working correctly.