Waypoint Showing Someone else's GT

As the title says, when I sign into halo waypoint, it logins it and shows someone elses gamertag- presumably a super old one that has been inactive for years. How do I correct this issue and get it to show my GT?

Thanks in advance, Spartans!

^See, I’m not OrangeThyme382. My real gamertag is much better than that.

What is your actual gamertag? Might be able to help you better if we know what it is.

Were you ever permanently banned from here? Maybe someone has the same login info as you. Ehh, don’t really know.

Never been banned from here! In fact, never logged in.
Real GT: GET MOPPED KID

99% sure you’re signing in using the wrong email.

If this is your account you play Halo on, then why haven’t you got any achievements. I’m pretty sure you are signing in with the wrong account.