The default view in Conversations is to show incoming & outgoing messages in the same view. If you want them to be shown separate you can change your view by opening the messaging application, then open the option list (lower right corner) and select "View folders". Now you can see the folder view (with folders Inbox, Sent, Drafts, etc.). In this view you can open the option list and via selecting there "Message view" you can toggle between "Conversation" and "Inbox" view for received messages. After doing this place folder icon on home screen.
It's not a complete fix but its a workaround.
Only other way wouldn't be legit so I won't go into it here theres others working on this method google it:)
Hope this helps?
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