Certain plugin messes up layout

Hello guys.

I’ve been having trouble using FL3R FeelBox plugin. It changes my post layout.
I tried contacting the creator but he does not reply and thought I’d ask here for some insight.

I think the solution is changing some of the plugin’s code but I’m not too familiar with doing this. If someone could point me where I could edit I would be really grateful!

To make myself more clear, below is two screenshots. The first is with the plugin deactivated and that’s how I want my site to look.
In the second screenshot it’s activated and causing the issue.

http://s17.postimg.org/52cb9op1b/deactivated.jpg

http://s18.postimg.org/tx3xny83t/activated.jpg

Thank you.