Shit! I found seeds forming on two out of my six beauties!

I have grown for a few years now and have never seen this happen. I started about twelve plants, and as always, I carefully and meticulously scanned over them daily for male preflowers. The ones I found, I threw out, way out. That left me with six, random genetics, females-or so I thought. They all formed perfect "V's" and even my partner and another friend all agreed they were definate females. My question is, how can seeds just appear on only two out of six nice healthy plants in a 4' X 2' closet, and the others not be seeded as well? I have never mis-diagnosed sex on any plant I've ever grown or helped to sex for somebody else, so I kinda feel like a shaved-tail Louie, newbie grower with such an occurance. Now the two plants that have seeds are both the same strain, a pure sativa of unknown origin, and they are actually both in the same huge feeder growing together. But I never saw the first pollen sac, anywhere on any of em....Have I just fucked up my whole crop, which is in it's 4th week of flowering and looking wonderful, or do I have something worthwhile, like viable sativa seeds that could possibly be "feminized" due to a hermie trait these two plants have? The other four are most definately NOT seeded, so itz just weird to me... Any help would be GREATLY appreciated...Thank you all...

They hermie'd . . .

Ok ok hold on ... Deep breath... It will be fine just don't harvest it all now they may be false seed pods that will shrivle...

Now look closer pull off a small nug of each plant an tear it up from the bottom to the top calax by calax examine each for hermafrdidic parts...
Then check each crotch or joint of branch where bud meets stem for hermi...
If none old or new allow plants to finish harvest any seed and sprout to eat yum!!

Awesome! Thank you! I wasn't gonna pull any of em anyways, because, for 99% of all of them they are big, fat, sticky, trichome-covered, stigma-laden nugs. I mean I got a closet full of donkey dicks here, so pullin' ain't an option. I have gone thru each one with a fine tooth comb, and me and my partner have never seen any bananas, or nuts, or anything resembling a male pollen sac and the males we did have way back have long since been discarded, so I dunno. The pods definately contain immature seeds, I wish I could say they were false, but at least they r only partially seeded, in that, they only have like one or two, here and there, so its not like some of that heavily seeded shit we used to buy in bags back in high school. Itz top quality shit, and mabye its a blessing in disguise, as I have possibly, unintentionally made a nice cross. Each of the five strains I have are all amazing in their own ways, and one of my biggest girls doesnt show ANY seed pods, so I dunno wtf I've got goin' on here. I salivate every time I look at em, I mean come on...I have three 250W hps, and one 400W mh, with great temp control, and wonderful nutes for em, and they r only in a 4' X 2' closet, so with like 13,500 lumens per square foot, I definately have some gems here, but I have never herm'd before, if indeed that's what happenned. Some of them did get nute burn way back in veg, but NEVER had anything but female preflowers. So, I guess I'll try to pop some of my "new strain", I'll probably dub "Woops!", and see what comes up.......Thanks again.......

I did find one little "cluster" towards the bottom of one of my sativas, the one that went hermie...so I carefully removed it and I guess itz game back on for now. There arent but just a few seeds here and there on a couple of my other plants, so itz probly not a big deal. They look so awesome and they r so fat and sticky, I'm pretty sure no one will mind a couple seeds. Who knows, the progeny might even be sum decent shit.....