Watch almost always works correctly for my swims. Not today. The fit file shows that I did each set twice. I swam 900 meters, stopped and hit split to stop the watch. Started the watch via split, swam 300, stopped the watch. Saved the file. This is my normal process, using the split button to start/stop each swim or rest period, not using auto-detection. The swim did not show up on Connect. Downloaded the file manually from the watch, uploaded it to Training Peaks, and it shows as 900 swim + 300 swim + 900 swim + 300 swim. Very odd. FIrst time this has happened to me. Going to delete all history from the watch and see if it happens again on the next swim. Software version 25.06