Replying doesn't put the reply below the original comment? Why?

Is this a setting somewhere that I can change? I remember when hitting "reply" to a comment situated the response directly below the original comment--this made it easy to track conversations. Now it appears to simply shove any added comments--replies to other comments or not--to the bottom of the comments list, and simply tags it as a response. I do not like this and would like to change it back, if possible.