Two Yutes... One Mute?

These two are from bag seeds and both emerged on October 28. Appear to be 2 different strains. Both got light burn on the first true leaves (followed the SF2000 instructions) the edges curled upward. Reduced intensity and raised the light and both appear to have recovered. Currently the light is at 20% and 24". One is definitely more robust while the smaller one has some unusual leaves. I discounted the first leaves as possibly due to the light burn but the second set are just as funky as the first. My searches so far haven't turned up results matching this particular condition. Any thoughts? Included side shots for stretch evaluation also. Still hunting for sweet spot for light height and intensity.