they look to be doing pretty well. Don't worry about the temps so much - my tent drops to 50 at night and runs at 60 in the day and i'm having great results, have run at 100+ and done ok as well - 74 is totally in the safe zone. As pjloudpack said give them some time and you shouldn't have any more problems with the leaves. Remember to underfeed versus over feed and underwater versus overwater and you'll do just great. Send me a private message or post in my grow journal and i'll answer any questions you may have.
Welcome and good luck!