Old Gamertag

Hello everyone, new member here. I noticed that my account only has Halo Reach statistics logged on it, and the account says that I have not yet played ODST or Halo 3 yet. My new gamertag, “Im Tayne”, has not yet played either of those games yet, but my old one, “Afae05”, has. I changed my old gamertag to my new one about a month ago. Is there a reason that Waypoint doesn’t include statistics from previous gamertags? Is there anyway I can add or combine the two gamertags onto this account?

Thanks

And it’s just a simple GT change you’ve done? Not created a new account? How long ago did you play H3 and ODST? How long have you had your account?