So you have a layered soil FULL of water soluble nutrients, and that's supposed to be helpful?
It's just counterintuitive man, and also contrary to ALL the experience, not only from me, but anyone that looks at it logically.
If you want to layer your soil, that's cool, just use different nutrients, guano and blood meal? That stuff is gone rather quickly, washed away, and if it's NOT washed away you are having some gnarly acidity and anaerobic conditions.
You can use it, I just don't subscribe to the method, nor the recipe, nor the technique, nor the reasoning behind it.