BP-Social 'Sign Up' button and 'Search'

I've decided to convert bestagentblogs.com over to the BP-Social theme. It looks great, but I have a couple of niggling issues:

While the text 'Sign-up for Free' works, the green 'Sign Up' button after the 'Already a member?' fields seems to link to the primary domain rather than any sign-up page. How is is supposed to work? Will it try to Sign a user up with the username and password a user enters?

The other issue is the 'Search' widget that doesn't appear to be optional. It doesn't find anything. I was using a custom google search for the site, and that still works. What do I need to do to get the default search working though?