3 seeds, 3 different plants........
Plants grown from seed can have the same genetic footprint, but can grow completely differently, seeds are not identical, just like children from the same parents are completely different.
If you go to week 7 in my diary "cannabis conundrums", I have posted pictures of hermaphrodite flowers and this may help you to identify what is going on with your plant.
As it is, your pictures do not show enough detail to be able to tell if any of your plants are hermie.