[thebigd]

It's a great system, but not perfect, even though it's just doing it's job.
I've had similar issues to the one you report. It gets your attention pretty quickly, especially if someones close behind you, not expecting you to brake.
Have also learned to switch it off while climbing the Toowoomba Range, and Cunninghams Gap. There's a couple of sharp right handers on both crossings that activate the braking. There's been no cars around, so I guess it's picking up the terrain directly ahead, before you hook into the turn.