It does sound like you are confused between forum username and password and tutorial password.
Tutorial doesn’t have a username and I never send password by email. You received that password when you were redirected to my thank you page after the purchase.
I guess you entered the tutorial password after the purchase. Your browser saved it for a week or so and now it’s time to refresh it but what you are trying to do is to enter your forum password for the tutorial. It will not work.
I just sent an email to your Yahoo address with password reminder and link and it should solve the issue.