I think what your seeing are signs of pre-flowers which should give you a really good idea of what you have but the guy's are right don't jump the gun just yet, you could have hermies or some shit like that. As far as trying to force flower I don't think you will be happy with the results. 12 hours of dark means complete dark. One tiny little ray of light from a crack in the closet door could actually stun your plants slowing growth, and you have to be able to move them at the same time every day for the next few months with out missing a day or you could also screw them up. I think your plants look really good and would just let them take there natural cousre. As far as the twisting and shit, try flushing you soil with plenty of water and see if that helps. You could have a lot of salts built up in the soil if you have been useing chemical ferts. Good Luck