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.
Did you embed your form to your site? I'm sure this is due to code conflict, re-embedding your form using iframe embed code should fixed this. Getting the Form iFrame Code
By the way, are you referring to your form http://www.jotform.us/form/32533549415152? I don't see any total in it. You may turn it on in your paypal field property in case you missed it.
Let us know if I've missed something.