I checked in for my 4 segment flight to GUM tomorrow. Upgrades cleared for the two domestic legs no problem and I got boarding passes for 3 of the flights. Basically I have boarding passes as far as NRT. That's were it went funky though. It won't give me the boarding pass for the last flight (NRT-GUM) for some reason. It gives me a page that looks like a BP, but states that I still need to check in? I have flown this exact routing more than a few times and this has never happened before. Anyone have an explanation?