Are you certain it isn't just yeast/trub stuck on the sides of the fermenter? Any layering I've seen, the layers are even across the fermenter and have distinct edges.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk