[Plugin: WP-Members] redirect back to post after login / logout redirect location

I have made the change to comments.php in theme twentyeleven as mentioned in one of your posts:
comment_form( array( ‘must_log_in’ => ‘You must be logged” rel=”nofollow”>http://yoursite.com/your-login-page”>logged in to post a comment.’ ) );

(1) How do I make it redirect to the blog post from where the user logged in.

(2) The Logout link on the Top right of admin bar logs the user out but redirects to the wp-admin login page instead of the member area login screen. How do I direct it to go to the login page of wp-members instead?

http://wordpress.org/extend/plugins/wp-members/