Bottom of BF upgrade list, Top of GF upgrade list

Can't seem to find definitive answer on FT. On tomorrow's (8/8) flight #837 from NRT to BKK, the last 12 names on the BF upgrade list are the top (and only) names on the GF upgrade list. Are these 12 people all in coach now, or are they somehow in BF but the system doesn't show it? Are they all non - rev tickets? Seems strange that the people at the end of the BF list will effectively prevent any upgrades to BF as they take the open GF seats (so no one moves from BF to GF).

Anyone explain what's going on?

Thanks