I have orderd many times from nirvana, and have had very good luck with delivery times. About the male/female ratio it's a matter of odds like if you flip a coin ten times sometimes it will be equal- heads and tails, other times it will be more of one then the other. Out of ten seeds I have had as many as eight females and I have had as many as 6 males. I don't know about nirvana's customer service as I have never had a problem.