Yep. Unless the plants are kept in completely controlled conditions, and pollinated by hand so that the pollinator is precisely known, each seedling will be a one-of-a-kind plant. The seedlings may be similar to the pod-parent, but not necessarily so, and certainly won't be a copy of the pod-parent. I will never know where the pollen came from. I know that my plants supplied the pollen (there may not be another plumeria in a 100 square mile area!), but I have over a dozen varieties that flowered in the spring/summer. I guess my plumeria can also self pollinate, but I will never know that. All I can do is list the pod-parent. When these seedlings flower, that's when I put a name to them.
I assume, particularly with the one that has 12 seed-pods, that every single flower could have been pollinated by a different plant, and thus, each seedling germinated from those twelve pods may be different. I guess, since these pods are growing by two's, and each two are from the same flower, I will have six different possibilities. This has gotten to be really fun stuff.