Thank you, it is amazingly rare how often someone will bother to take a few more shots. Shows you care and want great results, good for you!
First you have healthy plants, I would not be worried.
2nd, I believe it is a heat issue. I think i have those 6" convertible fans? They dont rotate and i wonder if that is an issue. You want a really consistent temp throughout your space...top bottom side to side by using fans well. If the lights are strong and a plant or part of it doesnt get airflow it will curl and eventually burn.
If fans are good then check your heat...it may be just a bit high. If lower leaves curled and not upper leaves it may have happened a week ago where it was too hot.
Yes you can remove leaves, any leaves can be taken off in veg. If they bother you or seem badly damaged just clip them off with sharp sterilized scissors.
My clue in your sitch is the leaves are curling not just at tips but the leaf sides are curling in. My best guess anyway.