Shipping settings

So I have Inclusive setup for products that are shipped from another location, Printful. These items also are setup where if a customer orders these products it is a separate shipping charge. This works well if the customer places an order that has items that ships from our local store and items from Printful.

But I find that if an order has only Inclusive items that ship from Printful, the order still splits with the original keeping the Inclusive items and then putting the shipping on a second order by itself.

Is there a setting that needs to be changed to prevent the shipping from being separated into a new order?