On top of all this, we have a rule against backseat moderating. What you've been doing (and admittedly, what I'm doing as well, to some extent) could be considered backseat moderating. You may or may not receive warning points for it, but you certainly could. Please keep this in mind, and consider rereading the rules more carefully.
As for your confusion about a lack of formal tone being standard, I actually have to say that your confusion confuses me. Not a single forum I've ever joined has had a mandatory/standard formal tone. Can you give me an example of a forum with such a standard?