WTF!?!?!?! Please Help

I have been vegging my white russians for about 1.5 months now under a 400 Watt MH. I started from seed. I have been giving them grow juice as a vegging nute. About 5 days ago i took clones from all the plants (Ihave 11) and also at this time i started giving them bloom juice (my flowering nute). the plants have been on a consistent 18/6 light schedule the entire time. Today i checked them and six plants are showing sex (3 male 3 female). I am positive seeing as this is not my first grow. How is this possible when they have never been on a 12/12 light schedule!?!?!?

lol had the ? about cfl's never had it happen with mh.

Either the plants are from an autoflowering strain or you're confusing a pre-flower with flowering. I'm going to guess the latter. It is possible to tell the sex if left to veg long enough without putting them into 12/12.

Some strains show pre flowers during veg. Why, I have no idea but my AK47 from serious seeds showed sex in about 40 days of veg. I asked the same question in my grow journal and someone replied that their grows using serious seeds strains did the same thing. Maybe its a testimonial to the genitics of serious seeds

Its not autoflowering strains because they only take 17-20 days to show sex. You have been in veg mode for 1.5 months.

Plants will show preflowers when they reach sexual maturity. This can happen at different times from strain to strain.

A sexually mature plant is ready to be Sexed, Cloned or Flowered.

I am using "white russian" from serious seeds (not autoflowering) and i am seeing white pistils and pollen sacks. would these be considered preflowers?