Interesting, my bag last tag was "Priority" but NO extra yellow tag. As it turned out I got trough the CBP/TSA quick enough to take an earlier flight. The app said my bag was expedited to my original flight which I had never seen before. When I arrived at my destination I asked at baggage what that meant and whether my bag might have made the earlier flight. Nope. I went home and later that afternoon I went back to airport and got my bag (20 minute one way trip so not any big deal vs a waiting three hours for my original flight).