My b2evolution Version: 3.3.3

I'm hoping someone can help me here. I'm not sure what I need to get rid of (or change) to eliminate the large gaps between posts. An example can be seen here: http://www.donofriowebsolutions.com/index.php/Portfolio/portfoliohome/ - notice the huge gap between each image.

Can anyone help?

I've tried messing with the index.main.php file but I haven't been able to figure out exactly what needs to go...

***UPDATE*** - I changed the above page to a single post to work around the issue, but it can still be seen in the gaps between posts here: http://www.donofriowebsolutions.com/index.php/Portfolio/accolades/