Apple Watch and runkeeper app

I just got an Apple Watch SE (GPS) and installed runkeeper on it. When I’ve gone on a run, I’ve opened the app and pressed “begin workout”. After the run, I stop the workout. The map shows up correctly as do the charts about heart rate, pace, and elevation, but the numbers for time, distance and pace are extremely off. For example, today I ran 5.7 km. The map of where I had run came up correctly, and when I went to the charts, it showed my heart rate over the entire 5.7 km. The pace and elevation charts did as well and the chart for the splits is also correct. However, in the overall statistics it says that I ran 1.46km and had a pace of 26:55 min/km. I can’t figure out what I’m doing wrong.