Horde only Migration not possible!

So, I have Alliance characters on the realm Tarren Mill and I'd like to transfer 2 of my Horde characters there from Stormscale and Magtheridon. S
ince patch 3.2 you can now host both Horde and Alliance chars on the same PvP realm but you cannot transfer a horde (or alliance) to a realm that already hosts characters of the opposing faction.
Is this something that will be fixed?