As you say, maybe they are so used to having to do it with your brother, that they have just gotten into the habit of it. Wow, they're getting to see your grades before you do. That would be frustrating.

You know them and I don't. Would it be possible to sit down with them and tell them what you have told us?

By the way, I (as a mom, too) am glad to hear you are working hard and doing your best without having to be pushed. Feel proud of yourself. I encourage you to keep it up. It will pay off in the future. Even bosses like employees like you. I am sorry you are being stressed out.