I was reading in the Help that:
Transition Type�Determines how LabVIEW distinguishes differing values on the plot. This only affects plots with more than one bit.
I'm guessing the behavior you're seeing (which I also see) has to do with the fact that this property "only affects plots with more than one bit." I'm still trying to figure out how to configure that. Are you familiar with this?
J.R. Allen