In the creative inventory, the Stone Button has an incorrect position. The Stone Pressure Plate is followed by the different Wooden Pressure Plates, but the Stone Button is not followed by the different Wooden Button, as it would supposed to be.
How to reproduce
1) Switch to creative mode
2) Open the inventory
3) Click the category "Redstone"
4) You see the bug described above
MC-1797 Sort order of creative inventory confusing