Comment notifications

I've not often received enough comments on a post to work out if this is a bug or intended behaviour, but when I came back to a post I'd made earlier, I found that there were comments I hadn't been notified of.

Edit: here is a specific post I know this happened on, I got no notification of any of phix's comments or of any of the back and forth they had with pipsy.

I've always assumed that if you are following a post then you would be notified of every comment left on it. What seems to be happening is only direct replies to the post are notified, not when someone replies to someone else's comment on the post.

I am used to being notified of every reply, whatever level of threading they are at on other sites, and having to click follow on every comment left in case someone else replies is a bit of a hassle, and obviously not something that is immediately obvious you would need to do in order to get notifications.

On a related note, being able to be notified of every comment made in a community you lead would be a useful tool as well as maybe a feed in the dashboard?