Looking at the Power Consumption section:

How can the total average Wattage be lower than any of the lines it consists of?

Total average power is 66.49W, yet average _Idle_ power is noted as 66.67W.

I think the Total is not the combination of the above listed items. The listed items are just sub categories. See the "Duration" column.

Out of 108h he did a 18h burn in.