6X23Watt CFL grow First time , bagseed 12/12 FS

hihi , Bit of an update .. And then there were 3
Yeah 3 stayed alive well 4 but i accidentally plucked one , and one is really ugly and deformed but im not getting rid of it untill its dead completely . The other 2 seem fine although one of them when growing its second set of true leaves started to only grow 1 leaf but the other one is now cathching up.
I also transplanted them to better soil i think ,
to be honest i was in knd of a rush when buying the soil so i hope its fine looks good it had perlite pre mixed i added more but the npk ratio is shown in a wierd way so i dont really get it, here are whats written on it pls clarify for me>
N50-300mg/l
P2O5 40-300mg/l
K80-500mg/l

Is this soil ok for my seedlings? also they still havent grown too much, They did tretch a little but i compensated by burying some of the stem when i repotted and gottem them closer to the lights. The 2 good ones are both on second set of leaves nearly 2weeks old. IS this fine could it be just a slow strain?

Also just some other news , Im going to be getting a bigger box going because i talked to my father about the issue and hes fine with it,
I am 25 so i was expecting this kind of reaction.

Ps.: Im gonna post some pics when the lights come on tonight so u guys can tell me if my
babies seem fine.

I'm a little confused on the npk as well. That's an odd way to list their ratios but I would interpret that as 3-3-5. If that is the case, this is not the ideal ratio for seedling. On top of that, seedling as this stage contain everything they currently need. Feeding is unnecessary at this point. I could be totally wrong but I think you may be on your way to nute burn which may be the reason for your slow growth. Watch them closely. Nute burn at this stage is almost certain death. Even if they did recover (if they actually get nute burned that is) it could take months for them to actually start growing again.