1. Looks likes they have lil deficiencies which can be normal after 7 weeks of flowering , the plant is focusing on the PK more than the N so they'll be yellowing. Check the runoff PH to avoid ph fluctuation
2. Check the trichomes to know when to flush ( with a magnifier ) , if you can't chek the breeder recommendation , if you can't then you plant looks more sativa than indica so after 7 weeks of lowering you can start to flush on week 8 and harvest on week 9 to take advantage of the actual yellowing ( scenesence ) , it will be a natural way to get rid of the chlorophyle.
3.Old timers are calling that kinf of buds " Donkey Dicks " so it's a pretty natural and common shape to me