Creating person walking and turn right and turn left

I have done a person that walks in a scene by creating a walk cycle and a moving cycle and In the NLA editor I tweak it. Then, I try to fusion some activities such as a person walks then turn left then sit down then stand and continue to walk. I am wondering, I have to do separately these activities and finally in the NLA editor I tweak in order to get the full animation. However, in this file , I try to apply this process but it did not work and it seems that I did not understand the logic of animation? Can you explain to how does it work?