I'm having the same issue with the plants having 3 and 1 leaflets as if they are stuck in weird bloom. I theorize that the clones were cut while the mother had progressed too far into bloom, and therefore the incorrect RNA is being expressed. I plan to ride out my deformed clones (now 6 weeks old) to the harvest for sciences sake.
If your tap water is over 200 ppm you should be using a hard water specific nutrient.
Anyone who knows more please respond.