Plants are extremely variable. I've seen bud grow out of a fan leaf. I'll say that again, a nug grow out of a fan leaf where the leaf blades connect to the leaf stem. I've seen albino tops that look very healthy and happy, but were light bleached. I've seen plants sweating balls of resin which tasted sweet, almost like a sugar cane but more lite (what? I had to taste it). Point of it, they do things you would never imagine. Don't worry about it, sit back, and watch the beauty begin. And 24ºC, 60~65% humidity is good for that age plant, could be a little more humid I think, but 60-65 will work just fine- I've worked with worse.