Wrong image on Facebook

Using Virtue 2.3. When posting the link to my blog page on Facebook, the wrong image is shown. When posting I get the choice between the image of my last 5 blogs , however, when somebody share this post, then the image presented by Facebook is wrong and cannot be changed. It will be easier to understang by going to the link on my Facebook page and cliking on Share.

Note that everything was fine before when I was using Twenty Fourteen