Gotta be from accidental hermies - all seedlings female so far.
There's a theory that way back when, MJ was a perennial and changed to annual. There are many stories of long established MJ plants being found or recognised, including one I heard of with 10cm diameter main stem (plant would have to be 8+ years old, wouldn't it?). So maybe somewhere in the ancient corners of the genes of some strains, the info on how to be perennial is still there waiting for circumstance to bring it out. So, me got a big bottle, cut off the ends n praying to an uninterested universe that my little miracle stick will have a long memory! Long shot for sure, but gotta be more odds on than eg winning the lottery. She's determined to survive, so maybe she'll figure it out!