topendtorque,
I'm not exactly sure that I've understood either what you quoted from sunnywa's post or what you said yourself. However, I think you're querying how it would be possible to roll upslope due to dynamic rollover. In fact, on sloping ground this is exactly what is likely to happen. Think about it...as you're trying to take off, the downslope skid comes off the ground first. Therefore your pivot point is the upslope skid. If you raise the collective too quickly, before you've centralised the cyclic enough, you will get dynamic rollover, about the upslope skid.
If I've misunderstood you, ignore the above.