I found random seeds on my plant...

Ok this is really a two questions but I was lookin at my plants the other night and i found 3 seeds on the big one. Right off of the main stem. Two at one node in the middle and one more the next node up. How could this have happened. the plant hasn't hermied and I haven't seen anymore anywhere else. Can plants make seeds like this without pollen. Are they just sterile worthless seeds? My only guess would be some pollen was lingering from my male and just so happened to hit there. But then I would think I'd see more. Any ideas?

Also my plants have been basically 100% cloudy with the trichs for a little over 2 days. when is the amber going to start to show up??

Thanks in advance for any responses.

I have read somewhere that the plant can produce the odd sterile, unfertilized 'seed' towards the end of its life. But I've never seen any proof of this.
You probably missed a male flower somewhere of there's another plant around your town that you don't know of.

Just a theory, but could pollen that pollenated a plant (ie: seeded up brick weed) still be viable on the weed and then be transferred to a new plant by your hands? It sounds like a stretch but I had an old grower friend get on to me for opening the grow box after breaking up a blunt of some schwag and not washing my hands lol.

some plants go hermie at the end of thier life trying to produce seeds to keep the breed alive

yeah i'm 99% percent sure it didn't hermie. I looked the plants over all their lives for balls and never found any. plus the other plant has no seeds at all
I suppose it could have happened but there's only these 3 and they didn't form in the bud. they formed right off of the stalk. well i'll save them see if they germinate next year and grow em outdoors. thanks for the responses.