hj fui fazer esse balancemento de novo e tive o mesmo problema que vc começava a abrir a pagina e nada.

Analisando vi q a regra do mangle esta errada coloquei em src-port e e´ em dst-port

errado:
ip firewall --> mangle --> add chain=prerouting protocol=tcp src-port=80 action=mark-routing new-routing-mark=adsl2
ip firewall --> mangle --> add chain=prerouting protocol=tcp src-port=443 action=mark-routing new-routing-mark=adsl2

certo:
ip firewall --> mangle --> add chain=prerouting protocol=tcp dst-port=80 action=mark-routing new-routing-mark=adsl2
ip firewall --> mangle --> add chain=prerouting protocol=tcp dst-port=443 action=mark-routing new-routing-mark=adsl2

Desculpa ai pelo erro.