I think we had this discussion over a year or two ago when we encountered six skeletons in the valley cave. I think we ended up killing them from range after they were turned?
basic:
If a cleric Turns an undead monster, the monster will not touch the cleric and will flee from the area if it can
I think OSRIC has a clearer rule for turning undead:
OSRIC:
While turned, the creature must move away from the cleric at its fastest possible movement rate. It will attack a creature that is directly blocking its escape route, but otherwise may not fight.
In effect, turned undead will turn around and but against a wall to try to escape a cleric and can be killed from behind.
I know we're not playing OSRIC, but what do you think?