I have two adsl,and using load balancing, but whether I using NTH or PCC, there is a common erratic phenomenon that is when I re-installed Mikrotik, I can log on any web page normally,but after few hours later,when I re-log-on these websites which I ever log-on just dozens minutes ago,many pictures in it can't display again,meanwhile,I can ping through these websites,and another websites which I never log-on after I re-install the Mikrotik, can log-on normally.Where is the problem?
I supposed that some contents of the websites which I ever logged-on has stored in cash or somewhere in router or in my computer,when I relog-on,it won't fetch from remote but from local,but it get nothing,so some pictures can't open?how to correct it?

By the way, if I don't use any load-balancing, it work perfectly.I had turned to the local website of Mikrotik these days, and found that many users in China had met this trouble now and then, and many of them still disturbing with it even now, this fault is quite representative,did anyone can tell it?

No one know why? It is still haunting me now.......

I think this can happen if you use NTH or multiple gateways, but it should not happen if you use PCC.