Name Changes, how? (NameMC)

[BrunoMars]

So I really want to know how this is possible. If you know how please let me know.
https://namemc.com/s?GreenArrow

 

[CakeSG]

The gift card glitch Doge

 

[Doge]

The gift card glitch Doge

This is a different case, but a weird one as one account is migrated and the other isn't. Either there was a glitch that allowed the same name to be claimed twice or two people bought minecraft under the same name at the same time.

 

[BrunoMars]

The gift card glitch Doge

One is unmigrated though.

 

[CakeSG]

It could be possible only 1 of them migrated their account?

 

[Some Dude]

Yeh https://namemc.com/s?Juggernaut