It works for a very simple reason that many fail to grok. A liquids pH has, at best, just a temporary effect on a soils pH, while the soil's pH has a huge and lasting effect on the liquids pH. That is, the soil will bring the liquids pH to the soil's pH. That 3.6pH of the tea will soon be the 7.0pH of the soil after being in contact for a short time.So I PH'd my tea after about 36 hours and found its PH at 3.6...? My soil is 7.0 so how in the world can that work! Also, the PPM of the tea was a measly 350! Are my girls starving?
This is also why it's so important to get the soil's pH right and buffered from the very start with the liming agent of your choice. THEN, the mantra of "In organics, pH doesn't matter" will hold true. It only works if the soil's pH is right from the start. With a pH of 7.0, it sure sounds like you added sufficient lime to your mix. Quit worrying/overthinking this.
Wet