Profile Error: Please help!

For some reason instead of my microsoft account logging me in as TheLegendairy1, it created a new user on here instead of my Halo/Xbox profile. How do I fix this?

Please help ASAP!

log off and relog

Make sure you are using the same Xbox Live email address / password that you use for your gamertag. Try signing into Xbox.com with those details and see what happens