Originally Posted by
Spec1alk
I did this and it looks like it created a new account (new rewards #), and it looks like it thinks I am a SPG member instead of Marriott rewards.
There is no difference between an "SPG member" and an "MR member". Which account you kept depended on how you were logged in. But once they've merged, it's irrevocable.
Originally Posted by
Spec1alk
I have seen an error with the Marriott mobile app
You have to log in (to either app) with your new credentials. Your old ones are gone forever.
Originally Posted by
Spec1alk
Should I be worried or am I fine as long as all my points are there?
No. Yes.