Can you please share a screenshot of what doesn't look right to you. If I have to take a guess I would say you might be seeing aggregated values of SKUs for all the accounts in INV01 module because DEM03 has SKU and Account as dimensions wheres INV01 has only SKU as a dimension.
In "DEM03 Demand Forecast" module select "All Accounts" in the Page Selector then compare "Final Forecast" of "DEM03 Demand Forecast" module with "Forecast Demand" of "INV01 Inventory Ordering" module. It should match.
My DEM03-Final Forecast number tallies with my INV01-Forecast Demand (1,201) but doesn't look right with the reviewed example provided in the lesson (2,048) in Week 1 FY20 and beyond. I have attached screenshots of my work in the first 2 screenshots and the example given by the lesson in the third screenshot.