If your thread is a self moderated, you will see some lines at the top:
This is a self-moderated topic. If you do not want to be moderated by the person who started this topic, create a new topic. (X posts by Y users with Z merit deleted.)
If your thread does not show it, it means yours is non-self-moderated one.
Self-moderation must be identified when you initially create your threads, you can modify and add that option after creating your threads.
Maybe you created your thread as a self-moderated, but if you move it to boards that do not allow self-moderated threads; yours will become non-self-moderated one. Nevertheless, I don't see it is your situation.