Thanks for the help Renee,
Check in RM under Lists>Media Gallery if those thumbnail type images have a red x in the lower right corner. If the media links are broken then it will only upload the thumbnails to the website. Use Tools>Fix broken media links in the Media Gallery to repair them. Right now if you do reupload it will create thumbnails you will want to delete the website first to upload a fresh copy.
Nope, no red crosses.