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.
With which form you are having this issue? I did check all the three forms you have in your account but did not find that you have used "firstname.lastname@example.org" in any of the email alert.
Please be noted that if you want to receive submission emails to this "email@example.com", you should actually add it in the "Recipient Email" field of your email alert. The following guide should help you change the email address used to receive submission emails: http://www.jotform.com/help/41-Finding-out-E-mail-Address-used-for-submission-notifications
Hope this helps.
Do get back to us if you have any questions.