Retrieving relevant job postings from Indeed

I am experimenting with the free version of your plugin before purchasing an upgrade for the site I am building for activity directors at senior living communities (https://www.entertainersforseniors.com).
I am having some difficulty creating an rss feed that provides only job opportunities that will be relevant to them. When I try, http://rss.indeed.com/rss?q=Activity%2BDirector&1=north+carolina, most of the job listings that stream into the site are from the state of Wisconsin.
I have three questions:
1. Is there an error in the syntax of the URL I am using?
2. Is there a better feed?
3. If I upgrade to Pro and set the plugin to refresh automatically on a periodic basis, will the job postings be refreshed by deleting filled and expired listings or will more job postings just be added.
Thank you for your assistance in my evaluation of your plugin. /Bill

The page I need help with: [log in to see the link]