Originally Posted by
frappant
Well I contacted Flying Blue Social Media team through their Apple Messages link on the AF web site.
They said they added my Delta SM account number to the booking but when I check My Booking on the AF web site, it's still showing FB miles and XP points to be credited.
Hmm ...
Managing your booking on the AF site while logged in (potentially even if logged out but still with the cookie from logout) is known to attach your Flying Blue number to the booking. Clear cookies and try to clear again, after which only manage the booking via PNR+name.