Hi. Thank you very much.
That should be clarified by the devs.
From beginning on I just played in three games, mine and the ones of my two coop-partners. So it is possible that I deactivated beacons and found places and savehouses in multiplayer.
In my opinion this statistic is useless. It would be much more interesting to know if you already found all places/beacons/savehouses in your game.
Don’t know if it’s possible, but maybe the stats-board could be seperated in single- and multiplayer in a future update.