Leaf deformities are typically caused by stressed/damaged roots from pH and/or over/under-watering. This is assuming it’s not some form of variegation.

Males are males. Females are females. Intersex plants can show both male and female parts. Males don’t turn female or vice versa. You can ‘reverse’ males and females to create feminized and masculinized seeds. No one is only making male seeds.

Hmm. I’ve never thought about that.. I hear people say don’t pop seeds from a herm though.