To me it looks like a flowering clone that you are trying to switch back to veg, it also looks like a bit of cal/mag def, with the brown spots. Time and a 18 hours of day light will fix the curling problem. Give them a spray with a cal-mag solution to fix the the small brown spots and add a bit to your nutrient solution next time you feed your plant. The third set of pics look like something was chewing on your leaf, if the trail gets any bigger you have to kill the bug eating your weed, somehow.