torches placed in a 1 wide tunnel always change the wall when placed on the right wall

SSP and SMP Bug:

What I expected to happen was...:
Placing a torch on the right wall in a 2 high and 1 wide tunnel.

What actually happened was...:
the torch was placed on the left wall or in front of me after a split second

Steps to Reproduce:
1. Dig a 1 wide tunnel.
2. Try to place a torch on the right wall.
3. Then it changes to another wall.