Remove New User and Admin Notifications in Multisite

Hello guys!

I am using wordpress Multisite + WHMCS to sell some sites.

There are three emails that I would like for my wordpress site to stop sending:

1. Email to new users in which they have a link to generate their passwords. This is not necessary since WHMCS generates a password for them, and they will get a New Site email a few seconds later with their login details.

2. Email to admin about a new user being created.
3. Email to admin about a new site being created.

For 2 and 3, I have the option unselected in my network admin but I still get the email notifications ;(

Thank you!

- CD