When you bring the min depth above the max depth, keep in mind these are parameters for sine function (like the preset in the first generator of the 3xOsc). You could achieve the same result by adding a 180 degree phase shift to that wave. Lets say your min depth=0.8 and your max depth=0.2, your output will have a certain sound that will tend to repeat itself over some period of time given by 1/(sweep frequency * 2). The 2 can also be a 10 if you have the frequency range set to large, but let's assume it's set to small. Now lets say you switch your min depth=0.2 and max depth=0.8, you will hear the same repeating pattern and same sound. The only difference is that you have effectively added a 180 degree phase shit, so the sound starts at a different point, but has the same repeating pattern.
Just so you know what you're doing, with a mathy explanation.
Good song btw!