Hi, This is nothing new. Shocking, maybe, and only until you get used to it, but not new ;) A USB 3.x bus is logically two busses, one for SuperSpeed devices and one for high-speed (and slower). A USB 3.x hub is logically two hubs, one on the SS bus and one on HS. (Note that you also have two root hubs of different speed.) All other devices are only on one bus. This includes USB 1.1/2.0 hubs. Regards, Michal
