I didn't see your followup question in that old thread...
Complaints count as a thread because they start a thread in the staff only Complaints forum. That's why we constantly tell people to use that
feature, it starts a new thread the entire staff will see.
I am sorry if someone has answered your question to your satisfaction already but the answer, in your case, is that you opened your wall by posting in
it. Opening your wall is listed as a thread but does not show in your thread list.