AZ... I had a look at my roof. Nice and smooth.
I can see the transition and feel it, it feels like thin wood (luan) and its stapled. Mine are generally stapled 2-2 1/2" apart. Occasionally 3". I can feel the staples.
Yours looks like they are stapled farther apart.
But then again, it's 50 degrees here and low humidity...but still, you shouldn't be doing that.
Looks like if you walked to the edge of your roof you could trip on one and go over.