Alliance / horde score imbalance in arena

Hi, I'm going to join the server as horde.

But, that seem that arena classement is umbalenced, in favor of Alliance. (50 1st teams are Ally)

Is it an armory bug? Or is there a real imbalance ingame ?

Thx

Considering most people who make characters planning to play PvP roll human, it make sense.

that is because racials.

and read realm info before attempting instanced pvp.