Alright, this is what happened.
I originally had my live account on my friends XBox, as I didn't have one yet. When I did, I performed an account recovery and shifted it over to mine. No issues, everything moved.
I moved in with the same friend about a month ago. I had been planning on getting the wireless attachment for my XBox, but decided instead to simply move it back over to his XBox, since I would be playing on that more than on my own. However, when I did, it changed the username back to what it had been before (I had changed it from Brn2BPwned to Privat3_J0hns0n) and none of my points, achievements, or credits moved with it, and it also states that I need to sign up for an XBox Gold account, which I already had previously (12 month subscription).
I am in need of assistance in fixing this, as I don't want to attempt to set up the live account a second time and end up getting two charges instead of one, nor do I want to lose a record of what I have done so far.