ASUS had new firmware available - updated and QoS 1000% better.
Only issue was that firmware has been changed so drastically that saved config file was practically useless and it took forever to set up the network with all MAC filters, forced DHCP addressing and NAT settings before I could even touch on QoS. But, all is done thanks for the input Aranarth.
Lesson learned - when troubleshooting never blindly believe that a device is doing what it is set to.