Conflict of private tabs

Hello! Nice programm. But It has problem (bug I think). I use this program for corporate chat-rooms. If I select any user in right part of window and select item "Chat..." in cotext menu, then I have private room this him. But! If another user send message to me in this time, then his message display in tab of user that I selected. Both of they can send messages for me. But their messages will to show in some tab. If I send message in this tab, last user get it.
I wolud like to have separate private room. :)
Each user must have own tab.
Thanks!