S.O. booked IAH-HNL and waitlisted using one of my RPUs. Looked at current fare classes and see this for front cabin: F3, A3, JN5, C3, D3, Z3, ZN3, P1, PN0, R0, RN0. Why is F3 and JN5? Shouldn't JN be <= F?

I know she needs R - the "JN5" just prompted the curiosity...

Edit:
Nevermind - found the "no mas" next to JN in the Master Wiki alphabet soup decoder...it's a zombie...