Having issue with columns. No clear div? Other content floating over columns.

See this page to view the issue: http://devineportfolio.com/whce/scholarships/ (look in Lynn Adamson tab).

Hey guys. I’m having an issue. I’m NOT using the page builder…I’m just using shortcodes directly in the HTML editor instead. I have my reasons, so I do NOT want to use the page editor to “resolve” my issue.

The issue is that I have use the column shortcodes to create columns…but the content that sites BELOW those codes is floating up and into the column content. Its almost like there is no clear:both for the column divs.

Here is the snippet of code in question:
<h2>2013 Winners</h2>
[av_one_third first][/av_one_third]
[av_two_third]<h3>Erica Eilenberg</h3>
<p>Erica is enrolled in the Masters of Public Health and Didactic Program in Dietetics at San Jose State University. Her career emphasis is in nutrition among at-risk families with young children. She is expected to graduate in Spring 2014.</p>[/av_two_third]
[av_one_third first][/av_one_third]
[av_two_third]<h3>Jin Hee Lee</h3>
<p>Jin is currently pursing her PhD through the School of Nursing at the University of California, San Francisco. Her research focus is on mental health issues among under-served populations. She is expected to graduate in Spring 2015.</p>[/av_two_third]
[av_hr class='default' height='50' shadow='no-shadow' position='center']
<h2>Previous Winners</h2>
<p>2011: Jennifer Brodsky
2011: Rachel Gratz
2010: Anita Maricela Lopez
2010: Pamela Kim Washington
2008: Joy Sun
2007: Elena Portacolone, PhD
2006: Monika Eckfield
2005: Karen Pak Oppenheimer
2005: Catherine Dodd
2004: Christine Lin
2004: Diane Norcio</p>

Any help you can give would be very helpful. Thanks!