Why not look a the manual (.PDF), it does have 1 port on the Mobo that connects 2 USB 3.0 devices.
Here is an example:
That Blue port can connect 2 separate devices using a splitter like this:
What does not exist is this mock up a peep made :
I ideally need one of those if it existed but it would only allow 1 device to work at a time which is fine as it would let me connect the USB 3.0 ports on my case and my front Panel at same time but use only 1 at a time which is fine by me.
I am not sure why this is the case because AFAIR old USB 1.0/1.1 you could daisy chain 127 devices from 1 port using hubs, no doubt its to do with the handshake and the devices being given a ID which may not happen if multiple devices are on 1 port, no clue TBH.