@leonardovsanto This is a reply to an old post, but maybe it will help someone else... I think perhaps your assumption for how to connect your two ISPs to your TL-R470T Load Balancer may not be...

I spent one day already getting my new Load Balancer (TL-R470T+ Load Balancing Router) configured to pass data through its WAN port to a CenturyLink Gateway. The trick was to put the CenturyLink...