This migration to the Marriott platform seems like a mess...

Couldn't they have done this in a few stages?

1. Provide new SPG number to all SPG members, keeping the old SPG.com site.
2. Update points balances and activity to reflect 1Starpoint = 3 Points.
3. Migrate data to new platform, which can be easily separated from the Marriott login. Or skip the migration to the new platform until the start of the program year or when members decide to merge their accounts. And at that point, maybe only the basics (such as points balance, YTD nights/stay/spend, Lifetime nights/stay/spend) need to be migrated and the historical detailed data can be provided like the current SPG activity history screen.

My Lifetime details are all messed up on the SPG side, YTD and Lifetime night totals do not add up (missing a few stays and my AMEX night/stay credits). Points balance seems correct though.

On the Marriott side, my last few stays are missing the 500pt welcome amenity, unless they've changed the way they are displaying those now in the activity listing.