Welcome email does not have the correct email

The welcome email, which is sent on successful email, has my website on the subject, but Rocket.chat on the email body. I checked the email template, but the {variable} used is same. Is this a bug?

Also, when i try to switch off the welcome email, it still sends it anyway. And the link to the website is http://localhost.

Are these bugs, or am i doing something wrong?