Buddypress Corporate Theme Allows Create Password But MU Still Send Out Random

I’m using buddypress corporate theme version 1.1.3, but when I tested out for a new sign up user, I saw that the theme allow a user to create his or her own password. But the email notification still sending out wordpress mu random password which is not working. The working password for buddypress user is the one that he or she had created using buddypress corporate theme.

How to modify so that email notification don’t send out random password if a user had created a password through signup form?