Thank you, JonusC. I think I might have not explained my point in a clear manner.
I do need the messages to be nested, and I do understand why when posting a reply the message box would appear at the middle, right below the message for which one replys.
But the problem is that when that same user who has just replied to a message, now wishes to post a whole NEW message of his own, if he won't refresh the page, he will now have to scroll in between the old messages to find the box... because the box is no longer at the bottom.
You gave YouTube as an example for a website that does present it this way.
Well, I stand for what I have said: I have never seen a website that desplays it in such a way, INCLUDING YOUTUBE.
You can check YouTube again. The replys you post there are opening a new box at the middle of the page right below the original message for which you reply, BUT if you now wish to post a new message you will still see the message box at the bottom of the page - it never left its place.
That is really the way I see it in almost every website that enables messages.
And that's why I asked maybe I'm missing something here or something went wrong with my settings, because as much as I really like this component, I will not be able to use it without nested comments that display a message box at the bottom for those wishing to post NEW messages.
So I hope I could somehow get a direction to a template or a tweak that enables that...