After my first lap pool swim there was an option to "calibrate" distance on my Fenix 5X. After entering the pool length and number of laps I saved my wirk out. Since that time, all of my lap pool swims are off by double. When I swim 40 lengths in a 25 meter pool it should calculate 1000 meters, but instead it registers 2000ish meters. I cant figure out how to RE-calibrate pool legnth. Any ideas?