Ight before we find the andser to the issue here, lets get some facts straight....
1. How is the "cycle" unknown?
2. Are you not keeping track of your first harvest's progressions and stages?
I. If not its ight. Just tell me how long you have switched the light cycle to 12/12 hrs a day.
3. What strain are you growing.
I. Indica, Sativa Ratio etc.
4.Nutrients used so far.
5.Temp and Humid conditions (curently and past)
6. What kind of light . (HPS ect.)
7. Size of grow space.
8. Indoor or outdoor.
Before I take the time to look into this further; I'll be lookin for that info from you. Also, I've been in your shoes and want to help.
Hypothesis: Symtoms showing dirive from something that may have set the plants into shock due to recent activity.
But, until then smoke a blunt because I might be able to find some shit in my notes for you.