Hi bkingsfirearms
Well, the thing is that ATUM works as you say in previous versions, but we decided to change this behavior.
So, if you want to obtain the sum of the calculated stocks of the product that you have in your shop you will need custom development to achieve this, but as we don't offer this service you will need to hire a developer.
In any case, there is a way to calculate it: If you have Multi-Inventory, you can put in a second inventory the stock of the parent product, in this way it will be count for the calculations of the stock widget.
Hope this helps,
Best Regards,
Andrea.