I'm setting up two controllers through two bluetooth adapters I bought. Problem is that while my computer recognizes the adapters in every usb slot (and sees them both), MotioninJoy only recognizes them in one slot (so it can only see one adapter at a time). Which means I can pair one controller at a time. It kinda sucks.
Also unless there's something obvious I'm missing you have to go to Profile -> Enable in MotionInJoy every time you reconnect your controller if you want the computer to recognize that the analog sticks exist.
I'm thinking at this point I'll just return all this stuff and use my PS2 -> USB Adapter which is a lot less of a headache!