Search function only showing one result

Hello, I have problem with the search function in Pinboard theme. My site, http://www.landauerradon.com, is built up with posts (3) assigned with a portfolio category, and there is also static pages and all of them have the “Full Width” template except the first page which has the “Landing Page” as a template.
When searching for radon, only the last added page is shown, although almost every page has the word “radon” in it. Also the posts contains the word, but they don’t show up (only the first).
Another problem is that the rest that should show up after the result (the text “There are no more resulys to display”), is gone. What can be the problem?
Thanks for help,
/Camilla