Dude, have you got any gaps around the door to your growroom?...your plants look fine and i have had the same problem with temps, exact tly the same as yours in fact. your top leave that you say look a little crinkly, they are but they rellax out in time, no worries there, if you want more humidity hang up a wet towel in your room, get you lights between 15-18 inch above plants, get fan ociliating from side, get 2 fans if poss and seal any gaps around doors etc, especially if your exhaust is near to or above your door...If any of this don't make sense dude, forgive me i'm stoned, ask and i'll try to clarify.