I have issues with the CX waitlisting system. I tried to waitlist 2 tickets booked in Y fare class on a HKG-PVG sector that was showing Y0. I did this around 2 days before the flight and I was informed the flight was overbooked, but I asked to be put on the waitlist anyway.

So on the day of the flight, I see that its showing Y2 on ExpertFlyer so I call CX eService and ask if my waitlist has cleared, they say no, the flight is full. I ask them to check again because I see the Y2 and then they then say that yes, there are seats available.

So my question is: if there are seats available, why doesn't my waitlist clear?

As a corollary, if someone else sees these seats open, and they call CX, they will be able to make a booking in Y class, even though I am waitlisted in full fare Y just because the system doesn't clear me automatically. How is that fair?