Sharing with Facebook issue

Hello,

I’ve added two social media widgets to my page, one is a Pinterest widget only shown on the home page and the second is sociable that displays at the bottom of all pages except the home page.

I noticed in testing that when I share a page to Facebook using sociable, it opens Facebook in a separate page and presents me with the post for inspection before posting. So far so good.

However, the selection of thumbnails the Facebook post offers me are not images from my WordPress page, but are in fact images from my Pinterest boards, i.e. other people’s work!

I have searched for a solution but as its a convoluted explanation I’ve struggled…

Any ideas will be greatly received!

Thanks!