We were booked through Charlotte to Southwest Florida. Upon arrival in Charlotte we were told multiple times that we could remain on the plane and it would continue on to Florida. It was also ok to get off. I'm 6'4" so I got off to stretch my legs and use restroom while my wife stayed in our seats. I happened to notice that the board was now showing San Antonio - not Southwest Florida! No text despite American app. No announcement, no nothing. We had to change gates and plane after being told otherwise. Terrible.