In the FAQ a statement saying:
"All credit transfer with you to another team in project Climate Prediction" under the "How can I have more credit than my team?" section is
made, that appears to be not correct. Possibly the workings at the project have changed since the FAQ where written.

Having been with the project for some years I now only joined a combined team at that project, where previously their was no affiliation to a team, in the hope that my credits would all migrate to the team. Not so.
Only the newly earned credits since joining the team have been awarded.

Any ideas?

Maybe they decided to treat team credit like every other project?