Actually what you don't make sense, whether the deletion of your post or not deleting the other post. It seems like you're creating this redundant thread with useless red color not to knowing the reason for your post deletion but to asking why mods did not delete other posts.

So my advice is don't worry about others post not get deleted or not but to improve your posting behavior. Meanwhile hit the "report to moderator" button when you think there is any violation of forum rule rather creating a thread in Meta.