If some experienced hybridizers could weigh in on this question, I'd greatly appreciate their thoughts:
What is one most likely to see from a "self" cross? Logically, I expected an intensification of the cv "selfed," or perhaps the face of one of the parents - or grandparents.
But 2 repetitions of this cross, a year apart, produced multiple identical seedlings... Which bear no resemblance to the recorded ancestors, even as far as 3 generations back. What gives? I'm suspecting an inaccurately identified ancestor. Is there another possible explanation?

You should get more answers if you post this question in the specific daylily forum, but one possibility I would assume is that your cross didn't "take", perhaps due to an incompatability, and an insect pollinated the pod parent with pollen from a different daylily. Not sure why the seedling would be identical in two subsequent years though.

Here's a link to the daylilies forum:
http://garden.org/forums/view/...

to NGA @Carpediemlilies

I don't know, but it surprises me that you would get multiple identical seedlings using a hybrid parent whether it was selfed or not. That would seem more likely if the parent was a species plant. I'll be interested to see what the knowledgeable folks with experience have to say.

Self-pollinating a daylily, if it is successful (many daylilies cannot be successfully self-pollinated) should not produce multiple identical seedlings. That would happen if a plant from a seed produced inbred line was self-pollinated. There are no inbred line daylilies. Even self-pollinating 'Stella de Oro' does not produce identical seedlings. They will all be yellow-flowered, but they will have different size flowers, the petals and sepals may be different shapes, the heights of the scapes may be different, the number of buds may be different, and so on.

Can you post some photographs of the seedlings? Can you post the parent's name? or a photograph of the parent if it is not a registered daylily?