As I have found out in the past, NetBalancer and QoS can not work in conjunction with each other. They use the same mangle table. I would get rid of the QoS and see if it resolves your problems.
Routing and Bridging Firewall Solutions
As I have found out in the past, NetBalancer and QoS can not work in conjunction with each other. They use the same mangle table. I would get rid of the QoS and see if it resolves your problems.