Simple question, I changed my gamertag months ago but my stats and games-played in previous Halo titles (3, ODST, Wars, and 2) do not link/update. My stats for Reach are fine and when I am in-game and enter the ‘Legacy’ menu blade it shows all my Halo 3 and ODST games played and random stats (Campaign missions completed, Grunts killed, etc.) (which are correct).
Now I know there are probably still some hiccups from the Bnet to 343 migration, but all my stats are linked on Bungie.net under my current gamertag name (For every online Halo title).
Direct link to my Halo 3, ODST, and H2 stats on Bnet
Other info:
-This Windows Live ID is the same one I have used my entire XBL career (7 years) only change is I changed the email address associated with it.
-I have changed my GT 3 different times in the past (still the same account) and my stats still (or at least, did) update/link on Bungie. Just some added info just in case.
Its not a huge issue, I just like being able to see all my games played throughout my Halo career in one convenient place.