How to reproduce:

1. Open attached project
2. Open scene 1.unity
3. Select the Soldier@walking_step gameobject
4. Open the Animation Window
5. Switch to Curves view
6. Select any property
- Notice how it is all smoothed out
7. Select animation walking_step_step in the Animator Window
8. Select any property
- Notice how it is all in steps, like it's supposed to be, but this was done manually by duplicating the animation and setting both tangents to be constant