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.
I just tested your payment jotform and I was redirected to Paypal side:
That was the standalone version of your form I tested, is this problem happening on your webpage where you have embedded it? If yes, please remove the embedded code and try embedding with the iFrame code, before embedding, copy the iFrame code in a notepad and remove the script part(highlighted code), example:
Then embed it in your webpage. Let us know if you need further help.