Yeah we’ll improve it to be more intuitive.
2/ Accuracy is by default set to 1km. but in my case , station position is displayed exactly the same in my view and the public view when not logged in as myself on FA. I guess it is a side effect of accuracy being a simple rouding of the coords.
The “exact” setting does no rounding, the “1km” rounds it to two decimal places, and the “10km” setting rounds it to one decimal place. If your second or third decimal place is a zero, yes it’ll coincidentally be accurate, but there’s no way for anyone to discern that, so it’s just as random.