Hi,
For some widgets/reports the calculations are based on the total amount of the order, while in some cases, it's based on the amount of the products (the sub total).
For example, if you restrict the widget/report to some categories or some products, then it calculate itself the amount as you don't want to use the total amount of the order since otherwise the calculated amount would take into account other products from the orders matching.
So basically, we would first need you to provide a screenshot of the settings of the widget to be able to check the situation and see if it's normal and why or if something can be done.