Slider not sliding all the way!

I’m having an issue with my slider over at http://www.roughnex.org/blogs/ where the slider wont slide all the way into the post and ends up looking like this: http://piclair.com/data/yrp9u.jpg

instead of this:http://piclair.com/data/79nf8.jpg

I’ve noticed that the left css is set to 400px by the javascript when sliding in but cant seem to figure out where to change it in order to fix my issue.

Any ideas?