PCC load balance and webserver

RouterOS General
1

my configuration exactly the same with http://wiki.mikrotik.com/wiki/Manual:PCC .
i have webserver on the lan. i use this setting.

chain=dstnat action=dst-nat to-addresses=192.168.100.2 to-ports=8080 protocol=tcp dst-address=ip_public_A dst-port=8080 
chain=dstnat action=dst-nat to-addresses=192.168.100.2 to-ports=8080 protocol=tcp dst-address=ip_public_B dst-port=8080

the problems is only one IP public randomly that able to access from internet at the same time.

2

if i have email, http, ftp on local network , how to prevent the ip /port to be loadshare, it’s seems only single line/ip public will available/accesible from internet randomly.