looks like over feeding of both water and nutrients. remember tht when your plants are so small they dont need to be watered very often. And if the nutrients you originaly put in havent had time to leach out than they may still be effecting the plants negitively. Dont use the neem oil. Its very easy to clog leaf pores being tht its an oil. Since you have very few leaves, they need to breath. They look over worked as it is. I would suck it up and start over with something thts growing good from birth. However this stuff is very rezeliant??? and your plant will still live. They just need much recovery and proper love