Behavior & Resource Section Text

I was just looking in my Minecraft World Settings and I went to the explanation part of Resource & Behavior sections. The text that explains them is wrong. It should say that they're applied "Top to Bottom" instead of "Bottom to Top"

I'm pretty sure that this is a issue. I thought that they were applied from "Top to Bottom"
Because when I place 1 texture pack on top of the default that replaces it.
??????????????