I don't know if this will help but:
Ive got 1 usb hub with pedals, mouse, and a joystick. I have another joystick and the keyboard plugged in directly. I have control map alzheimers now and wanted to let you know as unless the hub is a non input device I don't have any non input devices on the usb bus.
I have always (since november 2010) had a quirk where my pedals are not recognized by AH on startup, if I unplug replug they would work fine.
Keep up the good work
P.S. Its a Vista basic machine, I can't at this time justify buying either win7 or a new machine so there you go. I like the fact that I can run AH on it unlike a lot of sims.