Paypal not charging from form completion

I see you have incomplete payments. Usually that means that your users changed their mind in the last minute. However, to be completely sure I would recommend you to enable IPN

Here is how:

http://www.jotform.com/help/279-How-to-Enable-IPN-for-Paypal-Pro

That way you'll know for sure if there was a payment or not, regardless of the incomplete submission.