Number of steps per km

In the steps widget when I hit the ABC button I can see the steps converted into km. I have set up the length of my step to 50 cm in the app. Than I have used the watch in walking mode with tracking my distance while the GPS was on. The graph correctly translates the number of steps to km in the small table but the big number of km displayed at the top of the screen shows way to many km. Why is it like this? How to fix it and align the two?