Same dynamic here. I talk with my DD about letting things go, and also about pretending things don't bother her. Like you said, people seize on that. I have even suggested she practice a few things for when people are trying to wind her up, like saying "get a life." Sometimes you gotta fake it til you make it when you run a little hot. She seems to have internalized this and at 9 is a lot more chill than at 6. As for the bossing, talk to her about it. You don't want her to have issues making friends. Tell her to take a deep breath, let someone else do it their way, and then she will get a turn. I'm still learning that as an adult
