asking for registration code again

[RyoHoshi]

I pre-ordered. Registered early access code, have been playing all week, now level 90 and almost finished with Endwalker MSQ. I log off to take a nap. 4 hours later, I try to login again and it says I must register Endwalker. I enter activation code as instructed from the email. It tells me code has 'already been used'. ( YES, I know there are two different codes - early access and activation )
I hit up the Mogstation and SE Account login. Account status says I need to buy Endwalker. What the heck is going on???