Posts from blog to Facebook contain wrong image

Can WPMU Dev assist us in resolving a problem? We are having issues when posting to Facebook. Facebook does not take the designated images from http://www.pickleball.biz as part of new posts to our Facebook community page, http://www.facebook.com/pickleball.biz. This happens most of the time but not every time.

We use JetPack and the Publicize button, and when we create a post with a featured image, Facebook often does not pick up that image in the post, but instead captures a snippet of our header. You can see the results on the most current post (and several other recent posts) on http://www.facebook.com/pickleball.biz. Thanks for whatever help you can give us; we've tried a lot on our end but have struck out.