It is one of the jobs of the Mad Scientists and Psychotics to make sure that your posting is in the right place and gets the right audience so they do move things around occasionally. It is not criticism on you and if you think it is a wrong choice you can request that it be sent back.
The person who moves the thread may leave a note explaining what they are doing (if they use the "Keep locked topic in current forum after transferring" option).
If your post has mysteriously dissappeared, check other forums to see if it was just moved.