First Question:
I just had a user place a discussion at the following url:
https://www.drcarney.com/talk/1636-introduction
It also shows up at this url:
https://www.drcarney.com/talk/1636-introduction-1
I am wondering why it is showing up at two urls. I did not find two discussion posts?

Second Question:
I am wondering if there is a way to move this particular discussion thread underneath an already existing thread?
At this page https://www.drcarney.com/talk you will see a thread called "Welcome and Introductions" and just below it there is another one called "Introduction".
It would be nice if I could put the most recent one called Introduction underneath the Welcomes and Introductions if this is a possibility?

May I know how you access the page https://www.drcarney.com/talk/1636-introduction-1 ? I mean the page that generate the link to it ?

Do you mean that you want the post 'introduction' will be a reply for the post 'welcomes and introductions'? If yes, you can use the merge function

I had to login as administrator to the front end. I was trying to merge it from the back end.

I found that URL because I wanted to make a small edit to the discussion from the back end and when I did that was the url that was displayed in the field "Post Alias"
I wonder if the url is a bug. The reason is that when I go to edit the post from the back end it should not append another url. At least that is what I think. :-)
https://www.drcarney.com/talk/1636-introduction-1