As part of an AONE4, I had a confirmed seat on CX888 JFK-YVR on Friday. I went to review my booking today and was told that I am now waitlisted on this flight. My AONE was originally open dated, but I confirmed this segment several months ago. I plan on calling the AA RTW desk to see what happened and try to have them fix it. The flight shows full in First (No F or A availability). For all the CX experts, I have 2 questions:

1) How can this happen?
2) How can I get back on this flight in F?

Thanks in advance.

I'm going to cross post in the CX forum but wanted to make sure I got all the CX experts.