Thesis theme question

I’m trying to include a featured image to the left of my posts on the homepage of my site. So far I’ve gotten the image to appear, but the alignment is way off.

You can see it here http://things-to-do-in-jamaica.com

I’ve only done it for the first post on the page so far but you can see the alignment is above the post snippet rather than to the left of it.

Any ideas?