WarcraftRealms.com

I have readed the Warcraft Realm status a lot now, because I want to create a player on the server with most players.
And after reading this: http://www.warcraftrealms.com/realmstats.php?sort=Total
I found out that Suramar got most players of all US servers.
But when I visit the Official realm status page:
http://worldofwarcraft.com/realmstatus/
I notice that Suramar is only ranked as medium populated.
And in the ingame "Selecte a Realm List" the server is only low populated.
How is this possible? How can you got most players of all servers, and be medium and low populated at the same time? Which one is right here?
I don't understand a shit of this, can anyone please explain this to me?
And which WoW [US] server is the highest populated one???

If you go by the realmstats page here on WR, it just lists the total number of characters 'seen' on that server in the last 30 days. That doesn't necessarily mean that all of those characters are logged in at the same time! A better indicator of that is the activity pages:

http://www.warcraftrealms.com/activity.php?serverid=48

As for the realm status page on wow.com, that is supposed to be how many characters are currently logged into the game on that realm vs all the other realms. So it is a relative sort of thing. Same thing goes for the Realm List in game.