Hi there,
I’m not sure what you mean by the message doesn’t match. Doesn’t match what?
The screen shot you posted above is what will display if no custom Publicize message is set – in that case we use an automatic excerpt from your post for the status update on Facebook.
The part below that is a preview that Facebook generates themselves. That will either use a custom excerpt, if you have one set, or if you don’t Facebook will generate their own automatic excerpt.
So the status message and the Facebook preview will not always match, depending both on whether or not you set a custom Publicize message, and whether or not you created a custom excerpt for your post.
Please let me know if I’m misunderstanding you. In order to troubleshoot this any further I would need a link to your site, though, and preferably for the exact post.