Piston error

• What I expected to happen was ...: *
  Maybe there will be an error to the sun sensor. Or at least there will be a torch.
• What actually happened was ...: *
  Redstone Torch on the piston, which is off by pushing the piston to the red stone blocks.

• Steps to Reproduce: *
  One. Install a solar sensor.
  Two. Install the red stone geuyeop.
  Three. Install the redstone torch underneath.
  Four. Redstone Torch is installed next to the piston.
  5. Install the piston redstone blocks.