Closed!

Invalid, you are using the wrong coordinates. Look at the F3 debug screen and use the coordinates from the "Block" section. Example: http://i.imgur.com/T4KOaTQ.png

Concerning your new attachments: you are still not using the correct coordinates:

use the coordinates from the "Block" section

The Z coordinate is -4, not -3, as shown in your image.

If you're confused about the information on the debug screen, you should look at the wiki: http://minecraft.gamepedia.com/Debug_screen

The information shown is correct. You are AT a certain set of coordinates but your crosshair is LOOKING at another set of coordinates.

Please do not mark unreleased versions as affected.
You don't have access to them yet.

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The forum is a more appropriate place for these kinds of questions