YEs it is strange isn't it...??
But I think the whole diagram thing needs work on anyway... I notice that yours is showing your USB Devices and your HDD's, mine doesn't show my HDD's but I put that down to them being RAID-0, but mine doesn;t show my USB devices either, I see, is it a mouse and a USB HDD, on yours, but on mine it doesn;t pick up my Logitech Mouse, or my USB Drive, or USB Speakers, printer, webcam, or well any of them at all...!!!
It doesn;t even detect my DVD-RW drive, again as its on the SATA controller which is configured in RAID mode...!!
In fact the only thing it does show really is the Gfx Cards, my RAM and my CPU..... so its not really that good or reliable at all... just a nielittle novelty gimmick for AOD I think...!!!