Yeah, on of your females selfed and grew some male pollen sacks.
'Selfing' is a plants response to stress and also the end of the life cycle. Sometimes, when a female plant reaches the end of life, and realizes there are no males around to pollinate her, she will create male pollen sacks in a desperate attempt to pass on her genes. That's how you get seeds in 'fem' plants.
If you like the plant you got, keep the seeds and plants them out again. Some of them will be hermies, but some of them wont, either way the smoke could be amazing. Just look at chemdog.
His entire line is founded on hermie genetics, yet they, and their crosses (OG Kusk, ECSD) have become legendary smoke. There are lot of misconceptions out there about hermies and genetics. People who got a C in biology trying to tell what's good and what isn't.
And keep an eye on those hermies tho. It's sounds like you got lucky and only got a few seeds in your buds, but a single viable hermie can ruin your entire crop.
I'd say if you're not planning on breeding or you don't have a lot of room, then ditch the seeds in your bud and start over with new genes.