Can a hybrid clone that produced seeds ...split their lineage from the original hybrid parentage?

Can a hybrid clone that produced male and female seeds, when pollinated produce seeds that split their lineage from the original hybrid parentage? That seems to be what happened to me. I had a Ghost OG clone that produced a male and female seed. I grew them and pollinated the female with the male pollen. It gave me a lot of seeds. I kept 2 female plants i grew from the seeds and now in veg state they look like completely different plants.
My friend says it's cause people that grow are stoners and get the seeds mixed up. Ha. I really did take care to keep the seeds separate. What do you think the work of nature or stoner?
cheers
ps: hope i'm in the breeding is the right group

 

thanks for all the info folks. Obviously i'm a clueless newbie with seeds. A lot to learn. Just would like to learn to grow my own seed, i see it's more complicated than brushing some pollen on a female.