Jeff, are you referring to new (2016) posts, or older posts? If the posts are older 2015 and back, the site was hit by a virus at the end of 2015 and the cleanup process unfortunately resulted in the lose of some images.
If the missing pictures your are not seeing are in recent posts, please provide here a few examples/links to those post, so we can investigate further.
Thanks,
MRPLC Web Admin