May I know which photos that you mean above, did you mean post featured image? Also, regarding this issue, please try to disable all plugins except required plugin that related to JNews just for a while and see the result.
For the submenus, If you mean the submenus on the header menu, it seems I can’t find any submenu item on your header menu. Can you provide me your menu setup in there? so I can check it out on my side.