Halo way point stats gone

I have not been on any halo site in a few years, I would say that the last time I was on one was sometime in 2013. So when I visited way point again, much had changed. I noticed that none of my stats from halo 3, ODST, and Reach are on these forums. It says that I have not played these games. However, my halo 4 and 5 stats are on here. Does anybody know how to solve this problem, if it can be solved at all?

If you have changed your gamertag since you last visited then your stats for the older games will still be tied to that tag. It is possible re-sync everything, but you would need access to an Xbox 360 with the original games and have Xbox Live. Just play some campaign, customs or matchmaking and it shouldn’t be long before everything syncs up. The only game that won’t sync is Halo 2, as the original Xbox Live servers are no longer in operation

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> If you have changed your gamertag since you last visited then your stats for the older games will still be tied to that tag. It is possible re-sync everything, but you would need access to an Xbox 360 with the original games and have Xbox Live. Just play some campaign, customs or matchmaking and it shouldn’t be long before everything syncs up. The only game that won’t sync is Halo 2, as the original Xbox Live servers are no longer in operation

The same thing happened to me years ago when I changed mine