Promo: Overriding from Higher Intersection - incorrect value

Hello dear experts!

Have 4 items - 3 have promo in past and future and 1 only in future. dpos is CONSTANT (= 19.21 for all), there are 2 promo-days in past - only these sales are little different. All 4 item has promo in future at same day.

Sales in promo days are:

Settings:

Calculated effects are:

Have 2 question:

I.

1.46 = 28/19.21

1.67=32/19.21

BUT 2.04 != 25/19.21

How promo effect 2.04 was received for 106116095?

II.

From UG:

Override from Higher Level

This promotion type is used in conjunction with the Causal Higher Intersection set in the Forecast Administration Workbook.

It allows the system to use the geometric mean of causal effects computed from product/location combination in the same group.