ok now after lookin through your whole log Ive couple more things to say:

1.your plants are too stretched and you must stop this stretch by getting them closer to the lights(2 inch from the CFLs is perfect).
Repot them into deeper pots. When you repot bury the stem into the ground to reduce the stretch.
again move them side lights above the plants
2. Some of the curling down of the leaves is probably caused by nute burn because you are using miracle grow potting soil which is very hot for seedlings
3. In the picture you posted those aren't preflowers.. those are some sideshoot that are starting to develop.
sorry if I missed anything..
If you have any questions you are welcome to ask.
BTW I'm growing with CFLs too you can take a look at my log if you want

GOOD LUCK