Welcome email being sent to ALL users (but addressed to new user)

It seems the welcome email is being sent to all users, rather than just the new user.

The email says: Hello (email address of new user) and then displays the welcome message below, but it is sent to ALL users. I guess this is a bug?

I set the welcome message in the Group > Mannage > Email Settings tab. I have disabled this until I understand what is happening.

The other issue is it seems to send the email from my personal email address (connected to the account that I enabled the feature with), rather than the admin email address for the WordPress site. So all bounce notifications and responses get sent to my personal email address, which isn’t ideal. Is there a way to have this email sent from the WordPress admin email instead?

Is this happening to anyone else?

Thanks,

Jess