funky leaves

my seedlings are about a week and a half one of them has really droopy leaves. its seems green and healthy. it has a little bit of purple on the leaves for some reason. I have the seedlings under a 400 watt hps lamp. the other seedling seems to be perfectly normal. why are its leaves so droopy. id try to get a pic but all i have is my phone and its lens cant handle the intensity on the light.

ps.
My last gro.. outdoors I had a plant that was thrown a trunk. drivin with and replanted somwhere else. the plant, a female turned out mutated with a strange leaf shape that did not resemble marijuana the traditional marijuana leaf at all...whats up with that?! I wish i had cloned it...:(