LN only takes into account the item's default item type, as specified in the Item Type field of the Items - Purchase (tdipu0101m000) session. The item type that is displayed in the Actual Item Type field of the Items - Purchase (tdipu0101m000) session is ignored.
For instance, if you set this field to Manufactured, LN does not equate the cumulative receipts with the inventory on hand for items whose Actual Item Type reads Manufactured, but whose (default) Item Type is set to Purchased in the Items - Purchase (tdipu0101m000) session.