Help for my babies

Hey everyone, Kind of a noobie but this is my second time at growing. Anyone have any suggestions of what this could be. These are 10 days old and have been under
4' T5 high output bulbs for the first 9 days and just let them have a day under a 400 W MH for the day. Last night i noticed the spot and the curling browned leaf on the one plant (pics 1-3) and then a spot on a different plants leaf... Help me out guys and gals ...THANKS!

Anyoneeee???? Bump

I'm guessing that they are either drowning(soil staying too wet, for too long), or that you fed them already, and the fert has stunted them. Could be other reasons for it, but we need more info first. Temps? Watering schedule? Soil type? Fert?(and if it was used, how strong, and how many times) Etc....?

Temp is kept about 78 degrees. I water the soil when the first 3 inches or so (finger deep) is Dry. No fertilizer has been used yet. Only fertalizer is whats in the Scotts Potting soil I used but i researched it and am told its good for growing. Ph 6.8 ...I duno , guess ill just let it ride. I Flushed each plant today with about 3+ gallons of rodi water just in case the origional soil has to much fert or something. Could it be a sign of not enough fert ?