The username and password for your IndieMade site (for example, yourwebsitenamegoeshere.indiemade.com) and your main IndieMade account (that is, the one at www.indiemade.com) are not necessarily the same. If you change the password on one, that does not change it on the other.
If you've forgotten your password, just click on the "Request new password" tab on your login page, and enter your email address. You'll get a one-time login link via email. Click on it and you can change your password.
If you can log in at your IndieMade site address (yourwebsitenamegoeshere.indiemade.com) and not your custom URL (www.example.com), then check to make sure that you've properly configured your custom URL.