Redirect to wrong page after registration

I enabled registration through sociallogin on the site http://www.myhifi.it.
It works but, after registration, users are redirected to the last post, not to the page from where they registered.
I set sociallogin to “Redirect to the same page where the user logged in”,
so this is what I expected

http://wordpress.org/extend/plugins/oa-social-login/