Customizing a Record Summary to show continuous records

Customizing a Record Summary to show continuous records

I would love to know how to make a form almost exactly like the invoice shown on this example page: https://www.zoho.com/creator/help/views/record-summary.html.  The problem I am having is the data from the subform that would go in the Item,Quantity, Rate part of the view displays all in one record with a comma between them (so instead of two records, "Widget A" and "Widget B," I get one record with "Widget A, Widget B."  

I'm a new user and it might be that there is a relationship problem in my form or some other issue, but I don't see anything on the record summary settings that would let me display the records in this fashion.  Can anyone help?