This new site is so bad.
I login. Go to purchase a new flight. It asks me to pay for seat selection (I am Gold). I notice that somehow there is a "log in" button at the top of the page again. So I login again. Now my name is showing but it's still asking me to pay for seats. "Skip this step", whatever, I'll do it in MMB.
And then at the payment page, turns out I need to enter all of the passengers' details manually, because somehow they don't show up in "saved passengers".

This is so painful honestly.