What is your ISP Uplink speed that you pay for? We know it's 2Gb down, whats the UP?
You'll have to do a factory reset, walk thru the set up wizard, when that completes, go immediately into the QoS settings and change the values. We know there is a problem with QoS settings not working after a period of time and not saving any changes. The only way I've been able to get around this is to factory reset, set up wizard, then go in and make changes to the QoS settings.