Breastfed babies do not take in air once they latch. If he doesn't cry or whine then it isn't bothering him and is probably nothing to worry about. My daughter had crazy poops that went right up her back almost everytime she pooped. Not that young but he isn't doing that anyway. I always heard my new born pooping lol I think it's pretty normal.
I can't help with your questions as I've never breastfed, but I just want to say your little man is stinking adorable!
Never had gas issue with my first she rarely even burped. Only time she had problems was due to something I ate.
My daughter is The same way no matter what I eat lol.. some babies are just naturally gassy! Also breastfed babies take in air when they feed also....its completely normal though :)
It's probably something you're eating causing him to be gassy. Start keeping a food chart and eliminating certain things that may cause him to get gassy. Some babies are sensitive to milk, caffeine, certain veggies, etc.