Registration page shows 4 password fields

My registration page already asks users to enter their password and confirm it. The problem is that when I activate social login, it asks users to enter and confirm their password yet again. Please take a look at the page here http://www.blackhairinformation.com/community/register/

I have looked through the settings but couldn’t find anything that removes this. How do I remove the social login password fields?

https://wordpress.org/plugins/oa-social-login/