The cynical view is that they only bother aiding the armies they like, IE nerfing armies they don't like, or buffing armies they like. However, as an Ogre Kingdoms friend of mine said Granted, that particular FAQ was... Ugh, I can't explain it. It basically says "You can, but you are a bastard if you do it". To put it in relation to PF, it would basically be if their PF FAQ said: "You can use it in multiple ranks if you want, but we recommend you don't".