I just went out with my laptop and watched my preview on the IVS screen live while making changes.
With the tripwire drawn across the screen, it never changes color like some of the videos I have seen do. I increased the length, and changed the direction to both. Nothing changed.
However, as I am typing this, I got emails - 10 or 11. Motion detect, and motion detect clear. From both channels.
So, it looks like the problem is limited to some setting in the IVS somewhere.
I have been doing this administration using Pale Moon, not SmartPSS if it matters.