Under which heading those both 2 com# ports are listed?
In device manager under COM Ports, I have:
Communications Port (COM1)
Standard Serial Over Bluetooth (COM10)
Standard Serial Over Bluetooth (COM9)
2 Com ports returning the same Bluetooth Device?
Yes. I have confirmed when I remove the IOGear dongle, both the BT ports disappear from Device Manager.
It should not be like this there must be only one com# port for one Bluetooth dongle connected, as such uninstall and reinstall the Bluetooth dongle software on PC.
I have done this. I agree it is strange. I thought this may be a due to my having installed the Actiontech drivers 1st and then the IOGear drivers later (on Win7), but I was very surprised to have the same behavior on a fresh Windows XP system with only the IOGear Bluetooth dongle installed.
Just a little background. I have been in IT for over 20 years and have an EE, so I'm not a noobie when it comes to the PC, but I am very new to Arduino and of course this BT connectivity. I hope this doesn't come across like boasting - I only mention this to clarify I do know what I'm doing (to some degree) 
I really appreciate you sticking with me here. Thank you.
-m