Tests about emotions get kind of flaws when they have emotions about the tests...
"You angered her by ogling..."
I don't quite think he was the one acting in that case. But he's the guy, so he gets the blame.
"Chivalry" is entirely an opinion on what you think belongs in it. There is no specific code about it. Never has been. I would say it's not particularly chivalrous to push your standards upon someone else based on your own superficial understanding of someone's actions.
I think what chapters to translate should always follow the manga's order. The anime often differs, so assuming it's the exact same plot in both manga and anime is not a safe bet. And a lot of people want to either just read the manga, or make comparisons.
Doing SFX is entirely up to you. Writing a translation in the margin or where space allows works for me.