When both left and right clicking at the same time blocks will not place how they should.

if there is empty space behind a block and you break the block and place again it will be in the empty space because that's how it works but if you right and left click it places in the same place, Even if there is no block you could place it on.

Next blocks that will place differently depending on how you place them. I will use logs as an example. If you do this on the side of a block the inside will be facing the side you broke the block from like the state it would be in if it had placed normally just in the place of the block it would have placed off of. this also works with hoppers and hay.

Also with trapdoors when you target the side of the trapdoor it will place on top when on the side it will place on bottom.

Stairs will always face you but it will be placed on top of bottom depending witch half of the block you targeted. 

Also grindstones will only ever place sideways.