Yeah that’s normal and a good sign! Means the roots are undergoing vigorous development. You are on the right track man. I just hope they don’t turn out to be males!
A few things I noticed that may help. I may be mistaken, but it looks like the center of the plants are receiving the most water. It is best to start watering a little away from the center to keep the roots searching and growing for water. I just start doing this after the first node after the cotyledons as I feel like at that point roots should be well enough established.
Also, they will get droopy when they get dry. And sometimes when that happens and you water them, it will get worse for a bit too. Just make sure you aren’t over watering either and that the pots are light before watering.