We understand that the players in the Brag Tag Challenge can update this list every time tags change hands. We believe the process is very simple.
1) When at the Brag Tag Challenge page right under the name and a little to the right should be a + symbol and the words "Submit updates" - click the words "Submit updates"
2) When the page refreshes there should be 2 brown shaded boxes just under the words "Submit updates" and the box on the right should read "Update player tags" - click on these words
3) When the page refreshes you should be able to type in your new tag and the new number of the person you exchanged tags with
4) Then scroll to the bottom of the page and select the button that reads "SUBMIT TAG UPDATES"
Post up in the Talk section if you know a different way or if you experience any difficulties along the way.
Good luck to everyone and Have Fun!