What do you mean different email?
Is this your first renewal? If so then you would have used a credit card at activation and it would have turned on pre-authorized payments by default. Did you turn that off? If not then it should renew on its own.
That text is normal. It's the heads-up text just to let you know your account is about to renew.
If you have the welcome email in one of your inboxes then that's the login email address.
