Sending multiple posts to FB

Every few days we’ll receive several posts on our FB page generated from our WP site. These are usually 404 error pages linking to a NGGallery. I don’t want to remove the NGGallery. Is there anything we can do to prevent this? The last several FB posts totaled close to 100 FB posts. The NGGalleries were not recently posted. These galleries have been around for a couple years.