My character spehere trace did not attach to my character

I dont know why. I am a beginner in unreal. I have a question. Why when I press the play button, suddenly it spawn two character. One is my character from the location of the player start. Another one is a clone suddenly spawn in the middle of the air. But then I manage to delete the clone by delete it at the blueprint map (I think, I did not remember). But, nnow when I try to apply sphere trace on my character it seem that it stuck at the clone location and not on my character (which is the location of the player start. I dont know why ?