Post Feed / Preview Issues

How can I change the formatting of the post previews? Specifically….

1- Orient the photos to the left or right, not above and center:

http://www.awscpahouston.org/Wordpress/category/find-a-cpa/

2- Format the text. Right now, it all runs together despite how it is in the actual post

http://www.awscpahouston.org/Wordpress/category/officers/

Thanks !