Pulse width control duplication

I’ve still only had a relatively short couple of demo sessions on this so am re-reading the manual to get my head around more of the controls.

I notice that there appear to be two ways to manually adjust the pulse width of DDS2: with the PW (detune) slider but also with the PWM slider when its toggle switch is set to manual.

What’s the rationale behind this and how does it function in practice?

I can totally understand having a separate slider for manual pulse width control and one for the depth of PWM from the LFO or envelope. What I don’t quite grasp is what having a second manual control on the PWM slider brings. I’m a bit puzzled why its toggle switch doesn’t just serve as an “off” position for PWM and why manual pulse width control isn’t just done solely through the PW slider. (I can see that, as both sliders serve double duty, using one over the other allows you to choose which secondary function will be simultaneously applied.) The lower toggle position could be made to disable PWM but still allow manual control over the WAVE parameter.

Are the two manual depths (PW/PWM) additive or have differing ranges?

Does the PWM slider serve as a separate depth for each source simultaneously or does the toggle switch simply choose which of the three destinations is active singly?

Have I misunderstood how this all works?