Pigstep music disc is in wrong location in the creative menu

in the creative menu tools tab the music disc are sorted by when they were added into the game except pigstep is in the wrong location. It should be after 'wait' disc. 
The disc are also sorter by the redstone signal strength they make while in a juke box with comparator reading it. But once again the pigstep is out of order being power of 13.