Tag change and previous Halo history

I changed my tag a while ago and Waypoint on the xbox still shows history of the previous games, but the website doesn’t recognize this. The tag history link goes to a blank page.

Is there anything I need to do to link up my old tag to my current tag so I can see my whole halo history?

On another note, I also moved from the UK to the US and migrated my tag from a UK account to a US account - hoping this will not be a problem either.