Problems Displaying my Private Messages....Can You Help?

[Nala]

Hey all,

When I get a PM and go to my INBOX, I see a list of ALL my PM's and when I clock on the latest one, all the others are right on top of it and all I have to do is scroll up to see and read them.
I'm wanting to know if I can get my INBOX like it used to be where a PM comes in and it's an entity all itself that has nothing to do with the others.  If I reply, I'll see the reply under the initial PM that was sent to me.  Then when it's responded to....that will be message #3 in that subject of PM's.

How do I go back and get it that way?  I tried a couple other settings in there that didn't produce the intended results so I thought I'd come and ask for help.

Thanks all.
Larry