The protocols are out and now we can see what decided the judges regarding the single jump of Hughes and Nakano in the SP.
For Emily Hughes' triple Lutz, just 3 judges gave her a -2GOE, 4 gave a -1GOE, 2 the base value and a confused (or distracted) judge gave her EVEN a +1GOE.
If Emily Hughes was penalized for her solo jump without footwork, we cannot say the same for Nakano. Even if she as Hughes didn't do any footwork before the jump the judges gave her these marks = 6 judges gave her the base value, 1 judge a -1GOE, and three judges (that probably didn't know which are the requirements for the SP!) gave her a +GOE.
Why Emily was penalized and Yukari wasn't???