We saw that the way we were uploading the scores to the leaderboard required the player to go back to the main menu or launch the game again (either way was going to submit the score).
To fix that we changed the code to submit the score just when a stage is passed or the level is fully cleared.
In addition we removed the option of deletind your data to prevent some cases that could break the leaderboard.
Also we are having API problems so we changes to an emergency API that might be slower we will try to fix it as soon as posible.