There are tiny root "hairs" that you cannot easily see with the naked eye and however careful you are, and vermiculite does make it easier, there may be some root damage when they are transplanted. But they look fine.
I think you said that you damp chilled the previous seed/s for about two weeks? Some need longer than that which is why we usually say 4-6 weeks, 3 weeks minimum. That could be why the others haven't germinated yet if everything else is the same. If they haven't had enough damp chilling they can takes weeks or months to germinate. Some daylily seeds germinate with no stratification and some with only a few days, but there's no way to know that in advance for an individual seed. The current temperature also makes a difference.
Edited to add a picture of daylily seedling root hairs:
