USB 1.1 and 2.0 controllers in same PC?

I have a 3-month-old HP Pavilion a450n desktop computer running Windows
XP SP1. I am curious about the USB controllers reported in Device
Manager. I see 5 controllers, which appear like this:

Intel(R) 82801EB USB Universal Host Controller - 24D2
Intel(R) 82801EB USB Universal Host Controller - 24D4
Intel(R) 82801EB USB Universal Host Controller - 24D7
Intel(R) 82801EB USB Universal Host Controller - 24DE
Intel(R) 82801EB USB2 Enhanced Host Controller - 24DD

Can this be right? Do I really have 4 USB 1.1 controllers and only one
USB 2.0 controller?

If, as I suspect, this doesn't make sense, is my computer somehow
misconfigured?

(Also, what do the hex numbers shown in the above list refer to?)

Thanks,
- Bob