We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
I would say if you can not link more than one acount to the server on the same xbox then you'd have to cancel the original link and hope it let's you start over. I know on the EA sports server, both myself and my wifes account can both be linked at the
same time. If this doesn't work see if there's an account settings page for Bungie that will let you change the mislinked account. Good luck with this! :) Cheers!