Branch was about a month and a half older, but, he too fell in love with my hand. It was a shock the first time he tried that, had never had it happen before with my other boys. He tried to "love" my hand for about 3 weeks. It sounds like both boys are very similar in personalities and me and you treated them the same. Branch has always been a cuddler, so even when I suspected he was a boy I still held him. When his "attentions" started I realized real quick he got worked up if I were to pet him as he walked by. He was never aggressive, but a pet resulted in a bite to the back of my hand, most time trying to catch my shirt sleeve and then he attempted to breed my hand. After the first time I was ready and pulled my hand away and never let him finish. The bites never really hurt either but I had to nip that in the bud. In all this I never stopped holding him. I loved my snuggle boy and did not want to loose him. What I did was stop stroking his back as he walked by and that was hard for me to break. Instead I would pick him up and let him settle in my lap and pet him. He never got worked up if he was in my lap and me petting him, ever. I did focus my attentions though to massaging the back of his neck and base of his wings, that is his sweet spot and to this day he melts when I rub him there. Once he discovered and got brave enough to take on the ladies he forgot all about my hand. Also after discovering the girls I resumed stroking his back as he walks by, still do to this day. Sparring with his sister is normal. I would bet sometimes she initiates the sparring, that is just establishing themselves in the pecking order. He may be little, but, you need to NOT intervene with the big girls. They will thump him, but they will not hurt him physically. His pride, yes, that will be hurt and he will be rightfully taken down a few pegs. It needs to happen to all young roosters. Mr. P and Bert they too need to whip him, let them do it. He will be a better rooster in the end for whoever ends up with him with the lessons and beatings your flock teach him.
Now, I want to focus for a minute on Miss Little Chicken. Being a bantam she has the potential to lay soon after the 5 month mark in October. I am going to venture a guess right now that first egg comes the last of October to the first week of November. If so, who cares about the weather I am betting within 2 weeks of laying that first egg she is broody. Little chicken will put your silkies to shame in the broody department. She shall need to be watched like a hawk. She is little and she may already be showing it but she can fly and fly well. Your hay loft, it will not be safe from her. Actually you need to familiarize yourself with all the tiny out of the way spots now. She will find them and more that you would not think a chicken could hide in to make a nest.