The bug

It affects Chiselled Sandstone, Infested Chiselled Stone Bricks, Chiselled Stone Bricks, Chiselled Nether Bricks, Chiselled Quartz Blocks, Chiselled Red Sandstone and Chiselled Polished Blackstone. The inconsistency is, that the grey information (don't know the name) of all those blocks spells "Chiselled" differently: "chiseled". Both variants are grammatically correct, but this inconsistency makes no sense.