Sort Messages by Topic

Hi there,

I'm new to this forum, so bare with me, should I ask something that has already been discussed. I tried the search, but nothing came up.

So here is my question:
In Windows Mail I have the option to sort the messages in inbox by topic. This option is located at View->Current View->Sort Messages by Topic (I am using the german version of the program, so the actual title of these menus could be slightly different).
The problem I have with this, very useful, option is, that NEW emails are placed in the OLD conversation, resulting in new emails spread wildly across my inbox. This is very inconvenient.
Is there a possibility to change the settings somewhere, in order for the complete conversation to be placed according to the date of its NEWEST mail?

Suggestions would be greatly appreciated. Thx.
Vincent

PS: Grammar, spelling and any other kind of errors are probably the result of my non-native-speaking and can be kept as a souvenir ;-)

Nobody got any idea?

PLZ help!