Is there a way of viewing my inbox by discussion thread AND by the most recent message?

This is what I'm used to with googlemail - a new message will appear at the top of the inbox, along with all the other messages in that thread.

In Groupwise, I'm losing sight of things because this doesn't happen. For example, a new incoming message dated 25 January doesn't appear at the top of my inbox with the rest of the 25 Jan messages, because it's part of a thread which originally dates back to 4 January. It appears way down the list, with all the other 4 January messages. Can't find anything in the help files about this. I'm using the Mac Groupwise 8 client.