Blog and Tag images stretched/incorrect size

The display size is correct, however, it seems the image has been altered and stretched.

Examples:
http://aedengroup.com/food-and-beverage/
http://aedengroup.com/tag/recipe/

I attempted adding code in Styling Options > Custom CSS without luck.

Code:

.postimg {width: 100px!important;height: 100px!important;}

 

Strangely, this fixed itself. I could not find a way to delete this post.