redstone torch activates pistons that are not touching it

Put the summary of the bug you're having here

What I expected to happen was...: The piston to not extend

What actually happened was...: The piston extended
Steps to Reproduce:
place a block 2 blocks off the ground
place a piston on the ground 1 block offset from below the block
place a redstone torch on the side of the block above the piston