Originally Posted by
LandMiler
I faced the same error screen as #93.
Mobile App works for me too.
Checking-in via mobile app, I had no chance to put my FFP number on my record.
I had put them when I reserved seats in advance but now my record lost my FFP number.
I try to add it online they just return error as follows.
Unfortunately we were unable to record your Frequent Flyer number in your check in record. Please use the Add/Update Frequent Flyer function, or present your membership card at the Airport check In counter.
I used Add/Update Frequent Flyer function

I'm afraid I'm treated as non-elite flyer... I have OW Sapphire!
Edit: I confirmed my mobile BP shows I have no tier.
So the end result of my annoying adventures with CX website and mobile is:
1. It really bothered me that it all worked for a previous trip on the same flights
2. My AA FF# and OW tier showed on the paper BPs and the check-in agent @YYZ said not to worry about the web/mobile as it's on the paper and in her system and she showed me.
3. She was right and all 4 flights posted.
Where this can get annoying is if you need to be able to do OLCI for whatever reason and/or you need mobile to work properly
As for the lounge, she just handed me the Lounge Pass that is printed on the same stock as the BP. So, I had access to The Pier @HKG in between both TPACs and also the contract lounge in SIN.