Yes, absolutely - we should update that diagram to not use the U3 SATA dock as an example device!
As you noted, our USB 2.0 / 3.0 SATA Dock (http://plugable.com/products/usb3-sat… ), when used via USB 3.0, must be directly connected to a host USB 3.0 port.
USB 3.0 hubs (of any make or model) are not supported. If you happen to be using the dock in USB 2.0 mode (or through a USB 2.0 hub), that is fine.
In addition to the product page referenced, we have more detail on the limitation on the product listing: http://www.amazon.com/dp/B003UI62AG
The requirement and limitation lies with the LucidPort USB300 chipset in the dock, not with the hub.
Sorry for the bad news - I know this is frustrating if you don’t have enough USB 3.0 ports directly on the machine to give the SATA dock its own one. One working option you have is to run at USB 2.0 speeds. If you use the USB 2.0 cable that comes with the dock, you won’t hit the limitation (even when connected through a USB hub). But you will be limited to USB 2.0 speeds by the USB 2.0 cable, and it’s understandable if that rules out use that way.
If you’re stuck that way, we don’t ever want customers stuck with hardware that won’t work the way they need it to.
If you’re within 30 days, we make refunds no-hassle through Amazon. Just visit http://www.amazon.com/gp/css/returns/…They’ll provide pre-paid ship labels and a fast refund.
If you’re past 30 days, we’ll help directly. Just email email@example.com.
Again, sorry for the frustration here with this fundamental limitation – thanks for pointing this out so kindly, and please let us know if we can help in any way.