Needs some help with Classifieds Plugin css

I need some help with the classifieds plugin Css not playing so well with the theme I am using.

http://screencast.com/t/oqgOcjZPnP9E

If an image is added to the classified it throws the listing out as displayed above. And comes up with a bit of a weird "double heading" as you can see in the screenshot.

Just also wondering about how it displays in the listing as a square (rather than filling up the space)

http://screencast.com/t/Un69nErYfkh

And the fonts are different to the rest of the site.

If anyone could offer suggestions of where to go what to do that would be great!