Problem on blog posts page

Works perfectly on all pages but my blog page where it is completely vertical.

http://oceanswellventures.com/ships-blog

The rest of my sidebar has space and it is the same size/proportion as the rest of my pages.

Sorry I don’t know more but I’ve tried everything I can think of.

Thank you for your time.

http://ww.wp.xz.cn/extend/plugins/testimonials-widget/