In some situations, I disagree with the generic advice please don't reply to different sub-threads in one post, as there are times when the replies to each are essentially the same (either because both say essentially the same thing, or the narrative of your reply to one highly depends on the other); in such cases, I link to all the predecessors in my reply. But in a situation like this, where a user was doing three unrelated replies in one post, I do tend to agree with the generic advice given by LanX.

(and xnous, I replied in this instance by using the [reply] next to LanX's post, because I was looking at your post at the "top" but wanted to reply to that response rather than directly to you.)