Nathan from Olark here - make sure you give us the full URL (e.g., "http://clientname.app.com/settings). That should fix your issue.
The second rule you wanted to use probably can't happen just yet, but we'll look into adding it!
The third rule you can do if you use our Javascript API: www.olark.com/developer
Thanks for the feedback, and you can always email us at support@olark.com if you have any other questions!