What I expected to happen was...:
I expected for one block to be either placed or destroyed using one click.

What actually happened was...:

When attempting to place any Block, the game will automatically stack an extra one on top and anther block in front of it with only one click. This problem is particularly persistent with any type of Slab. Also, if I attempt to remove one, the one behind it will be removed as well.

Steps to Reproduce:
1. Place any type of block.
2. The majority of the times, an extra one on top and in front will be placed
3. Trying to remove the extra block causes for the one behind to be removed in the same click.