truthfully they probably doing some cloaking or URL redirect by IP. Ive seen it done a dozen times.
there are a few companies that have special permission to have a different display URL and destination URL, but the forwarding probably means they are cheating somehow. most of these ads will only run for a few hours or days, but some can go on for some time before they are caught.
email adwords support and rat them out
the display url has to equal the destination url, but you can use tracking urls to filter through first, such as in this case:
sortprice.com -> keyconversions.net takes in tracking info, then forwards to -> sortprice.com
I have this set up for a number of clients, but the forwarding to projectorpro.org is a hack