How can I add product and have them show in the Preview?

I have been editing one of your sales order forms. When I am adding additional products, then look at what it will look like, these additional products do not show; only the first two. Why is that? I've tried doing it several times and it is the same result. What am I missing?

I check your form (https://www.jotform.com/72808724161154) and the Product field should be displayed with a scrollbar so you can see all the product.

Do you still see the field with no scrollbar? If so, can you please provide us more details? May we know what browser are you using when you encounter the issue?