I post a new thread, and there are four subsequent posts. The thread doesn't show up in "Forum Threads" and the posts don't show up in "Forum Posts". What gives?

Whi;e I'm in the questioning mood, my settings for reading forum threads is in "Linear Mode" and is supposed to show the oldest post first. Isn't it? Why does it always take me to the very last post when I open a new thread for the first time?