Sorry I just want to make sure I have everything right :)
So.. Have Org GT and Org Email was hacked then Org GT changed to the SR Email.
Next you created a New GT under the Org Email.
Then the case was resolved, and you wanted to change the Org GT back to the Org Email.
But are having a problem, because the New GT will not change off the Org Email to free it up to then switch it with the SR Email.
So my question is.
Why are unable to recover the Org GT on the SR Email?
That is the first step, being able to recover the Org GT, then recover the New GT then switch the New GT email to a dummy (non Live/Hotmail/MSN account; These make xbox live GT on default) Email, this will then free up the Org email to be swapped with the SR email for the Org GT. But you need to be able to login with the Org GT to swap it.