Like todd said, your plants could be getting burned by your lights. It could be nute burn though also. The type of soil you used has "time release nutrients" which can really mess up younger plants. I would suggest transplanting into an organic soil that has no nutes added so that you can make sure that you're controlling how much the plants get fed. It'll make it easier to get your PH where it needs to be also. Pics would be nice, as would info like your runoff water's PH, how close your lamp is to the plant, what kind of light setup you use, how long you're into the grow, etc.
im using only 1 fluor light, a 32 w. haha but it looks good right now, just the fact that 2 leaves prolly got burnt from nutrients, and some other leaves just curl in