To venture a guess, it seems like it may be intended to be 3 turns +1rnd/lvl, but is mistakenly set to 3rnds + 1rnd/lvl.
I think the reason nothing been done about it so far is that no one can remember/agree about what it was supposed to be. Or that its not being discussed. I'm not sure as I wouldn't be in on such a discussion were it taking place.