Leromeanswered grow question a day ago Your plant could have been a hermaphrodite, which means that it would have developed some male sex parts and pollinated itself. This could be genetically or stress related.
Also it would be possible that your plant has been pollinated by male pollen that was flying around/stuck on your hands from another plant.
Either way, those seeds will not be reliable to grow them, they dont have to have the "automatic" trait because there is always going to be variation in seeds either way. Also you would possibly add unwanted genetics if it was from pollen flying around, it may be from another hermie or from a male rope hemp plant, and you dont want to waste your time cultivating unknown genetics. You could also be selecting dominant genes for becoming a hermie which you also wouldnt want. So better throw those seeds away and buy proper ones ;)