If you'd like to see the threads set out clearly, I suggest you go to your User pages; choose Settings; click  sub-choice (just beneath header) Comment Preferences.

There you can choose thread layout. Nested places each comment beneath the comment it replies to, in such a way that you can see how the exchange develops. You have to put a number in the Nested box, meaning up to how many comments you want the Nested mode to function. (I have 200 Nested). After that number threads get unwieldy. I have a + sign in the Dynamic Threaded box. That means that, in a thread over 200 comments long, the display will revert to Dynamic Threaded, ie the comments are nested but collapsed (only the header and poster's nick are visible).

At the same time, you can choose, under the heading Sort, to stop the highest rated comments being sent to the top (choose Ignore Ratings); and in which order (oldest first or newest first) you want the comments displayed.