Sometimes users post messages 6 threads that has already been posted by someone else. When this occur I like to join these threads. In some cases the thread is weeks old and I couldn't figure out how to join this old thread with the newly posted one because selecting the first message of the posts doesn't seem to add it to the "to join list" when there are to different posts on different threads. Maybe I'm missing something and this is a dumb question. But as far as I can see joining threads is not possible.