im a newb here so ill just say what i see from the picture and what ive read, that i dont see in your picture.
rooting is done in the dark, you have light right on your clones
defuse the light.just like seeds damp cool and dark. they look like they are growing new veg. so to much light.
secondly was no domes in your pics dont know if you used them or not. just didnt see them. i tried with out and my stuff dried up almost the first day, so i added a dome and it loved it.
just my two cents worth from a stump .
havent figured out that purple stem though
i got one on a clone from a friend like that cant get anyone to tell me what it is and cant find anything written about it either.
speedy