The photo that will be included in our social media syndication feature will default to be the first photo, which is also the Property website header photo.  If your photos have been resorted, you can assign the social media/website header photo from the client center.  On the photo management page, there is an "Options" button next to each photo thumbnail.  This is where you can assign the image.

Once this Facebook post has been completed, it can be a little tricky to change it.  One way is to clear the browser and/or Facebook cache.  Probably easier would be to delete the post and start over. Depending on the browser, you may need to do both.