I wouldn't worry too much, cannabis can grow weird leaves at times for no apparent reason.
After looking at your diary though, whoa, ease up on the feeding. Also, only use the "bloom" nutrients and not the "grow" nutrients too, this is basically a doubling up on what they need and would explain some of the strange leaves on some of your plants. Plant #1 is showing the classic signs of over feeding. At this stage of flowering, cannabis does not require as much nitrogen as when it is in "veg", and feeding both the "grow" and "bloom" together is too much in my opinion. Hope this helps,... Organoman.