Lack of explanation on "Color" Brush Options

I’m talking about these options:

image

I looked up them in the manual but only Airbrush is there. Even its description seems wrong:

The lower the rate, the quicker the color gets added.

I tested it in Krita 4.2.9 and the higher the rate, the quicker the color gets added.

Since most of them is unique to Pixel engine, they are described on the Pixel Engine page: https://docs.krita.org/en/reference_manual/brushes/brush_engines/pixel_brush_engine.html . Mix is here: https://docs.krita.org/en/reference_manual/brushes/brush_settings/options.html#option-mix

I can admit it’s not easy to move around those pages but it is how it is until someone comes and figure out a good system and change it, I guess. I would really like that, but I don’t have time to take care of this.