I had TG (international, since I had passed through immigration etc. in HKT) to CX connection at BKK. Everything went very smoothly: when we arrived at BKK our little "CIQ" stickers identified us as Int'l and we were directed by ground staff to an area signposted for international pax. The chap there didn't even look at our paperwork and shooed us up a set of stairs. That took us up to the daparture level - but we still didn't have BP's! We were mightily confused and tried to make sense of it. But eventually we had to presume we had missed the check-in transfer area on level 2. Luckily we had loads of time and we were travelling in F. So went to the CX lounge (which, as fate would have it, was at the diametrically opposite end of the airport) and they issued the BP's.

Still don't know where we went wrong as we were being herded all the way. But maybe the moral is: things can easily go time-consumingly wrong at BKK, so allow some leeway.