Sometimes a listing will show up on a site that the agent has not put there. It also can look as if the wrong agent is advertised the listing agent. Look closely at the fine print of these misc websites ads. You can contact the website directly to correct errors. Many sellers do not know that so many of these sites automatically pull information from the local MLS listing site information that the real estate broker has not submitted to them. I do not know of any agent who would knowingly advertise a property without a listing agreement. FYI, All Oregon Brokers answer to the Real Estate Agency in Salem. Good luck to you.