I've worked as a software developer for a long time. It is surprising just how much the customers are unable to tell the engineers. So what I imagine is the engineers found the data from the power meters was "noisey" and varied so quickly that it was impossible to make the display stable. Each group came up with a different idea of how to fix this problem.

I see the same thing with using GPS to measure distance. The GPS receiver finds your location on Earth once every second. So it can plot a series of dots on a map. But is the distance a series of straight lines that connect the dots or a curve of some kind? If you are driving a car on the freeway it makes no difference but if you are hiking on a trail with switchbacks it matters a lot.

Little details in how they process the data matter at the 2% level. It is to bad that they can't tell you the details of how they process the data.