Throwing then into 24 - 36 hours of darkness just prior to harvest is supposed to increase resin production per Jorge Cervantes book. I asked Stinky about it on chat and I recalkl her opinion is that the is really no difference. Six on one hand, half dozen on another.

Regarding the single blade leaves, that is something I have not experienced myself. Probably stress or poor environmental conditions is my guess. Do you have adequate ventilation and a fan circulating air in the grow space?