The leaderboard has some issues to handle the scores by team : it doesn't (necessarily) display the best score of the team ! The leaderboard is updated each time that a participant beat his best score. So if participant #1 of team #1 obtains a new (personal) best score of 0.1, the leaderboard is updated for team #1 with the value of 0.1. Then, if participant #2 of team #1 obtains also a new (personal) best score of 0.2, then the leaderboard is updated for team #1 with value 0.2, and this is an issue.
To fix this issue, the easy way is that participant #1 go to the "Participate" tab, "Submit / View Results" menu, and click on the blue cross of his best score. It opens a list of available actions (like downloading some logs), and you click on "Submit to leaderboard" to force the update of the leaderboard with this score.