Thanks for the quick answer, Andy!
Seems like that's the only point of confusion I have, though I did notice another apparent contradiction that could cause some confusion that isn't in the errata. 6.2 on stacking says the stacking limit of forces occupying an area is "the number of units that can occupy an area is 3x the number", this is meant to be 'number of SP in area = 3x the number', correct? I believe 3xSP is what's listed in the 'rules gotchas' (and seems to make sense).
I'm sure I'll be writing a session report or review when I'm finished with this game as I'm just so impressed how much important and oft-ignored historical detail you managed to include. For now, I'll just mention how awesome the Gendarmes ability is!
You're absolutely right about the stacking being 3 x the number in SPs. I'll add the clarification - thanks.
And thanks for your kind comments, I'd really appreciate it if you could write a review/session report.