To tell you the truth I would like to see Open+Won value in Column Open as a special Value for Open new deals
It makes sense that this is the result. Since the values for Open and Won are based on the Stage Group values, each of those will show up under its respective column. [Win] is only calculated when [Stage Group]='Won', so that's why the value for Won shows as null under "Open."
Can you help explain what you want the final view to look like? If you have a workbook you could attach that would be really helpful.