A. No, this will never happen in the bot's lifespan, this isn't a desirable outcome as jar is verified and if it were to happen, both jar and jaradc would get terminated and deleted off of the platform.
A. No, jar cannot see your messages and jaradc does not have any interest in reading whatever your server sends.
A. You can use this guide to aid you into setting up the different autoposters for your server.
A. You can ask in the support server, where you can either talk about small issues or create tickets for urgent ones.