Which is weird, because "X", "10", "XI", "XII", "12", "XIII", "13" are all unambiguous, while "11" could be read as "II" = 2 depending on the font. In other wor

Which is weird, because "X", "10", "XI", "XII", "12", "XIII", "13" are all unambiguous, while "11" could be read as "II" = 2 depending on the font. In other words, they switched exactly as to maximise ambiguity.