Affecting top nav menu on events page

First of all, this is an amazing plugin. This is exactly the tool my client will need to manage his posts without having to invent calculus. Unfortunately, it appears that there may be some css in the plugin that is conflicting with a couple of pages within the website. Here is a link to the website. http://www.egregorygraphics.com/georges_demo_1 Click on the events calendar page to see how the plugin is affecting the page. Any thoughts as to fixing this would be great.

http://wordpress.org/extend/plugins/post-types-order/