PPC landing page that isn`t indexed is showing up in GA organic traffic

How could a PPC landing page that isn`t indexed in Google be showing up in GA organic traffic for the main site? I search for the page`s URL and double-quoted text from the page, and nothing shows up in Google. *Update* After checking server logs I discovered that the traffic was coming from Bing. A Bing PPC campaign was started last week, and Bing indexed the pages. How they actually rank for anything enough to pick up 5 unique sessions yesterday I don`t know. They`re​ standalone pages with no incoming links.