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.
Are you referring to this http://www.jotform.com/51276147758161 form? I see it is showing the correct format:
You can always change the format on the edit mode of your form by click on the date field, and change it with the Date Format button:
If you don't see any changes, try clearing your forms cache: http://www.jotform.com/help/229-How-to-Clear-your-Form-Cache
Let us know if you need more help, we will be glad to assist you.