Columns Not Working

I am trying to set my webpage up with thirds columns but it is not working. How do I get the final third over to the righthand side?

http://www.driftcoffeehouse.com/about

[one_third]
<h2><a href="http://driftcoffeehouse.com/our-coffee">About Our Coffee</a></h2>
[/one_third]

[two_third_last]
<h2><a href="http://driftcoffeehouse.com/our-coffee">About Our Smoothies</a></h2>
[/two_third_last]

[one_third_last]
<h2><a href="http://driftcoffeehouse.com/our-coffee">About Our Pastries</a></h2>
[/one_third_last]