Now there's a delightful notion. I wonder where my luggage could have gone without me? I hope it was nice! Whoever used yours should at least have left you souvenir or two! :D

Actually, I suspect your tags might be because the flight was a connector. I.e. you (and your baggage) did not fly through that airport, but the plane it was one connected there at some point in the journey when you were on it, and so they used those tags.