In this image i ve shown how the images are croped. In the catalog and single page the images are cropped on the 4 sides and you can see this when you click to see the image in its full dimensions.
https://www.dropbox.com/s/2mccdl6bu3t1qqj/Untitled.png?dl=0
I checked the demo that you have available for woopress and the images are not doing the same thing. All the images in its full size are shown without crop in a smaller size in the catalalog and single page.