The email submit button is set up to send only the data (in XML format). If you want to send a PDF, you can delete the email submit button, then put a regular button on the form. Set it to be a submit button, then in the submit to field se it to mailto:mailaddress. Now you have email functionality. To submit the PDF, change the Submit As dropdown to PDF. Now it will email a PDF to the address specified in the mailto: URL.