I obviously don't know anything about your situation, but the article specifically talks about: "Lost baggage is when a passenger’s baggage is lost or goes mis

I obviously don't know anything about your situation, but the article specifically talks about: "Lost baggage is when a passenger’s baggage is lost or goes missing due to an error on the part of the [Kansai] airport." Perhaps in your case they considered the delay to have been due to somebody else's fault?