Start over.... Get a bag of fox farm ocean forest and a bag of light warrior. Buy solo party cups and fill them half-way with a mixture of 60% Light warrior and 40% Ocean Forrest. I say halfway because they will stretch the first 2 days and as they do, you can keep adding soil til their is about 1/2 inch of stem above ground. Drill many small holes around bottom edge of cups for drainage. Moisten the soil fairly well but slowly by filling up a spoon(tablespoon) Make sure to get a mister bottle also Place the cracked seed pointy part down and cover it with soil so it is no deeper then 1/4" Get cling-wrap ( clear plastic wrap) and cut it into like 5 inch squares. Mist the square cling wrap you cut and place it over the solo cup you prepared. Take a rubber band and secure the cling wrap around the brim of the top. You do not need to poke holes. After the seed sprouts, leave the clear wrap on for maybe 2 days to make sure the seedling has all the moisture it needs. Make sure the keep the plastic wrap misted so it always has humidity. Consider day 1 the day the sprout pops through the soil, from day 1-3 you will most likely not need to water since the humidity domes will hold the soils water. After day 3 you can remove the plastic and let the plants grow like normal.At this point, the soil will dry out easier remember. Using this method, I have a 98% success rate with cracked seeds.
Your problems I can bet:
Water - Make sure you pick up some distilled jugs from the grocery store 4 or 5 will last 2 weeks and will cost 3-4 bux Try walmart as the Ph is almost always 6.2 from my experience. You can water right from the jug with no problems and ph adjustments.
Soil- Your soil is most likely too hot (with nutes), Ph is off (from 6.5), and it looks like it doesn't have good drainage Pick up the fox farm bags of soil I suggested. I promise you'll have success
Light- Simply too much light. Save the Mh for maybe 1 1/2 weeks in. Until then buy 2-3 6500K cfl's which can be placed about 3-4 inches above the plants. This ensures rapid growth with no heat stress chances from MH. After 1 1/2 weeks plants are plenty strong enough to have an MH say 2 feet away or even closer as you watch them adjust. Remember, its easier to put the light farther away and make them stretch rather put it close and watch them die from heat =O
Containers- Just me, but I hate those seedling trays which can hold 20 plants. I'd get solo or small party cups so you can watch each plant more carefully and maintenance certain plants easier. Also my plastic wrap humidity domes only work with solo cups haha
All I can think of and I wish you luck. If you get the things I listed, I will guarantee success!