Great question and a problem for everyone. Many public web sites and mobile app's are not updated as frequent as the MLS sites that agents use. Entered Dates need to be viewable to listings, articles and postings. Maybe an expiration date is also needed like we have for food products.
also see http://realtor.com/bio/chriskoto for Listing Book and or call me or send your email and I'll set you up with everything including an app for your phone and mobile tablet that gets you aacurate information.
Listings on the internet are current. I would be pleased to hear from you and to help in your search for a property in the Northen Palm Beahes. John Q. Podesta, Managing Broker, Capital Realty Residential, 561-379-5875 or EmailJohnQPodesta@aol.com
Ann, you need to find an agent who can send you the latest listings. Right now, with bidding wars happening regularly in South Florida, buyers need to act like sharks, pouncing on the best opportunities.