Need Clarity on functionality of Forecast type in Avg Daily Demand and its calculation logic.

Summary:

In PIM, under Planning tab, we have three Forecast Type options for "Average Daily Demand Calculation". i.e,
1. Historical Sales
2. Order Forecast
3. Sales Forecast.

In my case, i have a Shipments History data. I generate a Forecast in Demand Management and Run a Supply Plan with it. Safety stock configuration is Days of Cover.

When i use "Order Forecast" option in PIM attribute, Average Daily Demand ( ADD ) is calculated based on Gross Forecast Values.
If i select Historical Sales or Sales Forecast, the ADD is same as before. Please see attached screenshots.

1. In case i need my ADD to be calculated based on History, the first option should have worked.