Some of my images aren't showing up

I am setting up this website for someone else. I used Woothemes/WooCommerce to do so. All of the photos for the products are showing up except the last two I’ve tried to add, and the only images that don’t show up are the thumbnails. I’ve tried compressing the photos using photoshop thinking that maybe I had reached a storage limit or something but that did not fix it. I tried multiple types of image files (jpeg and png).

I need some recommendations.