Anybody know why I can't add a subdomain to my domain? I tried adding "test.mydomain.org" to "mydomain.org" but was told I didn't have permission to add subdomains to my domain.
It sounds like you're not the account owner. That's the person who can add these. Once it's added, then they can set up permission to let you manage it.
Ah, but there's the rub. I was logged in as the account owner.
Now I must figure out why the account owner is not the true account owner.
Are you sure you your account is selected as the active account? Check the bottom right of the panel.