Where did you get the seeds? If there just bag seeds ive found alot of those seeds are abused and miss handled and it creates deformations in the leaves. Get a few more sets of nods on the plant with the weird leaf and see if the deformations continue. if they you can keep growing it as long as it wants to grow. but anytime i had a seed sprout like that it never got bigger then 6-10in so I pulled all of them before any bloom. hope i helped