Hi there.
I noticed that the average calculation of the data tab (here for a cycling activity) is not what i was expecting.
It’s just taking into consideration the total count of intervals, but should (at least in my opinion) take into consideration the duration of the intervals aswell.
If i am looking e.g. on these OverUnders with different timelength between the over and under portions, the average (e.g. see here the avg pwr) as a whole is wrong/puffed up. (i wish it would be true 
)
I just saw that @Roman_Skakov posted a (maybe) related issue.
I am not sure it this issue is new or if you intend to calculate it that way.
Thanks anyway for some clarification 
Is my report here valid or not?
As you said… it was probably implemented that way by design.
This was the announcement