Hi Greenchiller,
Sorry to know about that. They were looking so good, it's very sad and it's not usual at all. Sometime a male can appear, that's why they are not 100% feminized seeds, but 2 of 8 plants it's not common and the worst is that at least one of the plants has both male and female flowers.
I also hope all the other plants are not so sensitive and only show female flowers.
Keep us updated. All the best and kind regards,
tommy