For a second dataset your shortcode must have two layouts, in your example you only have layout=18, but the second dataset must have it’s own layout.
1. Be sure both forms are active in the PRO2PDF Plugin’s “Activated Forms” tab (ASSESSMENT REPORT and PERSON FORM)
2. Create a second layout for the student’s name (Use the same PDF Form, but must map student name from PERSON FORM to Student Name in PDF FORM)
3. There must be at least one dataset in each Formidable Form for the mapping to work.
I’ve created a demo for you to view, I will email the login credentials to you.