How sweet of you to worry about the particulars of posting!!! It took me quite a while to learn this stuff also.
Andy gave some great info. I would add that if the info you are posting is sort of a different topic (like he spilled syrup on the floor and then after some posts he threw a rage in the car and it could have killed you) it is helpful to start a new thread. That way we can try to help with-o getting too lost in a thread.
If it is a real problem then one of the moderators can separate the posts (very rarely done) or lock a topic that has become very off topic. Or the moderator or someone will suggest starting a separate thread.
NONE of us gets upset if you ask questions and if a topic needs to be separated then no one is upset with you - it is done so that we can stay on topic to get help and support to you.
I think it says a LOT about you as a person (ALL good stuff!!) that you are dealing with the difficult child problems, working, trying to find help and be sure each of the kids gets the help and support they need and then you also worry about etiquette here.
((((hugs))))