Facebook Sharing problem

When someone uses the Facebook sharing button the popup displays an incorrect, unrelated thumbnail image. BUT, Facebook actually posts the correct image (which in my case is always the first image in the post).

Is this is Shareaholic bug or Facebook bug?

I’ve tried turning the OG option on/off and also using another plugin to
force the first image to be the OG image. But none of these things affect the popup image.

If you want to try it:

http://www.vegasnews.com/130952/aristocrat-employees-donate-22980-to-make-a-wish-southern-nevada.html

https://wordpress.org/plugins/shareaholic/