Switches generate a signal, and that signal transitions in tiny, tiny periods of time - switches aren't like valves, where there's a long period of half open. If you've ever been an idiot and tried balancing light switches half way, you've seen the impacts of this.
Contact bounce is a real issue with practically any sensor or switch feeding into electronics, and it's likely that there's some averaging and smoothing in the RDCs over a handful of milliseconds to handle that.
The EAFRs/FDRs only sample data once a second. That doesn't mean that the rest of the plane isn't operating on millisecond timings, just that the EAFRs only record each parameter (at most) once a second.
IIRC they were reasonably good at disambiguating terms in the report. I don't see them doing all of that then intentionally including "01" with some esoteric meaning only known to their internal flight data group that's only just been set up, and not even adding any kind of note or meaning.