It sounds as if something is compromising WPtouch's native functionality. Try testing your other active plugins for conflict.
To isolate which plugin(s) may be contributing to the trouble, deactivate all except WPtouch from within the WordPress Plugins area, clear your browser cache and local data then test.
If WPtouch functions well, you may then enable the rest of your plugins one at a time, repeating the process, until you can identify which is/are causing the problem.
If that doesn't give any information about the issue, post your url so we can have a look or email us directly with it: http://www.bravenewcode.com/contact-us/