[Plugin: NextGEN Gallery] Right margin pushes down my gallery

Hello,

I am having a problem with my NextGen Gallery where my thumbnails are being pushed down the page by the content that I have in the right margin. I am new to Word Press, rusty on building websites, and I tried to search for a way to resolve the problem and couldn’t quite find a solution. I’ve tried viewing the site on Firefox and Safari and I have the same issue.

An example of this is here:

http://www.sarahspencerart.com/?page_id=8

Thank you!

http://wordpress.org/extend/plugins/nextgen-gallery/