Purchase analytics column is wrong

Using “Purchase analytics” report on “Buying” module, when selecting Supplier on “Tree Type”, and based on “Purchase Order”, the total below columns if fine, but:

  1. When selectin “Supplier Group”, the first row shows “All Groups” and the “Total” in last row is adding “All Groups” plus “Every each supplier”, son the “Total” is double.

  2. Also, when selecting “Item” or “Item Group” the total by “Ammount” is different, inconsistent, and a lot of products shows “cero” even when there’s purchase orders in the same period.

When selecting “Item” and “Purchase Order” the total ammount is well different .