If you are having trouble with the Image for your Landing page appearing when you try to post, use this link to debug. Copy the Landing Page URL and insert in the required box. Click Debug and Scrape Again, until you see the correct image in the box.

https://developers.facebook.com/tools/debug/sharing/?q=http%3A%2F%2Fpages.wiseagent.com%2Fpages%2F%3Fid%3D396CEE79-FC35-46DD-BA11-1A67FC2DA311