No it doesn’t, it uses the last report for each satellite, not the monthly average.
It automatically checks whether the last report deviates a lot from the monthly average and adds a warning below the overview when it does. This should catch low last reports. The disclaimers are there and I have always been very clear that this relies on the best data the node can provide. If the source data is crap, I try to warn people about that. There is not much I can do about the satellite issues or node issues causing source data to be faulty or people ignoring the obvious warnings I’ve added.
It certainly never is and never was presented with certainty.
It does, but unfortunately there are sometimes also incomplete reports from satellites. Not much I can do about that except adding the warning.