Mixing pop for Argus?

My server (Kel'Thuzad - US) is an Alliance heavy server, but for some reason when I go to Argus since a day ago there is a lot of horde from other servers there, is Blizzard intentionally mixing server population on Argus? If so why? One of the reasons people move to heavy population from there faction is to not have to deal with the opposing faction, are subscriptions lowering so now you have to mix populations?

Please Help !
Thanks !

I didn't find the right solution from the internet.

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