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.
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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.
I did check your form and found that the "Random Value Generator" widget is not hidden. There seems to be some glitch as the "Hide Field" property is not being displayed.
I am reporting it to our back end team. We will get back to you as soon as this issue is fixed.
For now, I will suggest you to inject the following custom css code in your form to hide the "Random ID" field:
The following guide should help you on how to inject custom css code: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes
You can now hide the code from the Form user as shown below:
Please check it out, and share your experience.