I don't really know a way to increase the potency of the buds, but i do know how to extract all of the tic from the buds so you can experience the full effect of your shit.
Sometimes that just happens. All it takes is ONE male part on your plant. Females sometimes grow "bananas". These USUALLY don't contain viable pollen. You can get the occasional seed from time to time though. I wouldnt consider it sinsemilla, but I also wouldnt consider it a hermie.