If this bothers you, it bothers you. My reasoning for doing it this way is 1) an idea about the post occurs to me after the first response I give, so I weigh in again, 2) I like posting things in their full context most of the time (I've been increasingly moving away from isolating one point, quoting it and responding). This has just become how I am comfortable posting. By all means, if it bothers you, feel free to stick to the first post, but I feel kind of like you are issuing a command here, which makes me even more reluctant to alter how I am responding.