When I browse my photos in Lightroom, the Library module shows strange altitudes in EXIF data. I just shot 163 images on a swamp here in Finland. The correct altitude is 45 meters above sea level. Lightroom shows 93,6 meters, 37,5 meters, 27 meters and 53,6 meters depending which image of the very same sequence I watch. The pictures are taken with Canon EOS 7D Mark II. There were similar problems with a DJI Phantom 3 Professional DNG files.