Mobile on/off switch is not directing to non-mobile page

Hello,

We’re using WPtouch on UNC’s WordPress instance. We’re having some trouble turning the mobile site on and off. When a user selects the “on/off” switch at the bottom of the mobile site on their mobile device it redirects them to web.unc.edu and not to the non-mobile version of the page. As an example, the page below (and other sites on UNC’s WordPress instance that have WPtouch activated) has this issue.

https://cpdurrance.web.unc.edu/

I’ve had the same issue on an iPhone and a Droid. We’re using WPtouch 1.9.32. We’ve also tried it out on development server which is running WordPress 3.2. We get the same result as our production server which is running WordPress 3.1

Any suggestions on how to fix this?