What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You may like to take a look the following guide on how to make your form mobile responsive: http://www.jotform.com/help/311-How-to-make-Forms-Mobile-Responsive
I did check your webpage where you have embedded your form and it seems you have used your form's full source code. Please be noted that for your embedded form to be mobile responsive, we recommend you to embed your form using it iFrame embed code. Please embed your form using its iFrame embed code and we will check the issue you may have. The following guide should help you grab your form's iFrame embed code: http://www.jotform.com/help/148-Getting-the-Form-iFrame-Code
We will wait for your response.