My xbox account shows my new nickname and my old nickname to what do I do

I changed mine about 4 weeks ago and it took about 15 days before it had properly changed and the old one had disappeared. Give it a few more days I think it's still in the process of changing

It will eventually update and one will be removed give it some time and it should be fine.

I had a check of your profile and i think i might know some reasons.

1.Because you changed your nickname it might take a while for it to take your old nickname off due to if someone that once was a friend but accidently unfriended you, they wouldn't know your new nickname so with the old one still there they can get back
connected.

2. Due to Covid-19 theres less people at Xbox so you might have to wait until someone there changes it fully.

3. It might be a small bug but you check if you can fix it at https://support.xbox.com

In my opinion i think that the first one is the most likely

because of quarantine, the function is malfunctioning patient friend

go to the game's website and change it there to.