In my opinion of accounting internal control, the total AR in Aging Report must be equal to total AR on TB or GL.
As you mentioned that it is in progress please complete it urgently to ensure the quality of Aging Report as there is a control on total against TB and GL.
It is also good to have the program calculated aging for every invoice while new or before due ones will be classified in the current column. The total of this column with other due columns is equal to the total by TB or GL. So, we can be simply satisfied with the report quality.
Should there is the limitation of program to do so please elaborate the mechanism.