The irony of this....
At some point the woman he is growing for is going to get pissed and get him into trouble for growing just to get back at him.
i actually had a kind of spotted leaf on my girl in my grow pro i just cut it off and never saw another one again.
I didn't see anyone mention this about the yellowing leaves, but your first "starter" leaves will yellow and fall off as they get replaced with true leaves. Nothing to worry about. Looking good, cant wait to see how things turn out for you. The more headroom you have the better, limited space is a pain, it more fun (IMO) to let them veg for awhile since it gives you more to play withNot to mention it doesn't hurt in the yield department.
Ya that heat is probably why they kinda look funky. Also, as you lower that temp the humidity should rise. Now I know there will be someone who swears 27% "is just fine," but I can promise you that your plants will look better vegging with a higher RH. Good luck.
good venting and enough passive intake are the easiest/cheapest. you can get ac also