how does "Allocate freight on line item basis " without landed cost option work ?

Hello, 

Currently, I am using the PO- receipt of goods - Invoice workflow in Sage100 and I am running in an issue with Freight costs.

When I create a PO with a few items, I add the freight to the total PO amount, not per item. 

However, when I create the Invoice against this PO after receipt of goods, the freight is being applied to all items and not the Invoice total.

I expect that Freight should apply to the invoice total and not each line item. 

My setting in the PO module is as follows.

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The invoice and report look like as follows --

Pls advice, What am I doing wrong ?