Alterac Valley Mines

Hey there, I'm not sure if this is correct or not, but when capping a mine in AV sometimes your faction NPCs will be Neutral (happens to both alliance and horde) which do not attack the troggs unless provoked by their grounding totems. The miners and leader Will be faction and attack though, however without the rest of the troops they quickly die. Also, I've noticed whenever the horde cap a mine, their miner's are lvl 61, while Alliance miners are only lvl 52-54, is this supposed to be correct? I know troops can be upgraded but even in a long term battle ground I've noticed Alliance miners not scaling. I just wanted some clarification.