I'm not familiar with KE but the AF/KL earning tables have been a mess since the start of the JV 3+ years ago. Some bright mind C&P'd a few too many things, thereby creating hybrid tables mixing up VS and AF/KL booking classes. Even after going back and forth with them about this in e-mails three years ago it still has not been properly fixed. The people responding didn't even understand the mix-up.

For example, AF PE booking classes are W, S, and A but the AF M+O table on the VS website mentions W, S, and H, the latter of which is a VS booking class for PE. Also, P and F are listed as both Première and economy, same for W and S listed as both PE and Y. I would not be surprised if this is (still!) why O is missing from the earnings table. You could try digging around FT to find first-hand reports to see if it does credit in practice, but unfortunately I don't know.