Please replace the ??? with your data!
Hidden fieldset holding the hidden form fields and values shows as an empty box on an iPhone.
I imagine this is something peculiar with the ajax loading in the wpTouch plugin. They don't know why 'hidden' wouldn't be working for this fieldset…but it doesn't.
I just commented out the fieldset around these hidden form values in the bottom of cforms.php on my other sites. Left this site as is until you get to see it. Let me know after you have so I can apply my hack to this site as well.
Great work…I wish you were "for hire".