Hi how are you publishing your link in Facebook?
simple copy-paste to the facebook status field
When you copy and paste do you notice if you have an option to select more than one image?
only one, and i have to select “no thumbnail” so there is no picture (wordpress logo) shown.
Very strange I just copied and paste your URL link on my facebook account and I don’t get any images.
but, do you know how to put my own image there. I don’t what to be empty or wordpress logo?
Have you disable right click on your logo? Maybe this is preventing Facebook from grabbing your logo.
I found a plugin that might help you with this Add Link to Facebook
Other than that plugin I am not sure why it does not add your logo. I tried with my website and it grabs all the images on my sidebar..
I hope this helps you.
Kind regards