How do I change my username?

Hi, sorry if this has been covered before, but how do I change my username? 

Here's an article:

https://support.chess.com/customer/portal/articles/1444791

You can use this link to change your username: http://www.chess.com/home/change_username (Please Note that you can only change your username once)

Hope this helps! :) 

When I visit the edit profile link, and click 'change username', it just brings me back to that page? With no box to type new username in, or any difference to the page?

It says I've got 3 new comments, so there should be 7, but I can only view up to #4. Is this a bug, or am I just looking at the wrong place? :P 

It could be a bug. I'm looking into it. :)

As per changing usernames, how many times have you changed it before? If you have already changed it, the system will not allow for a second change.

I've never changed it before. 

Ahh, I see the comments now. Wish they were still hidden XD