For some reason UploadNewEntry is updating the first user's name only, not actually adding a new entry to the leaderboar
Viewing post in Leaderboard Creator comments
Maybe you missunderstood the idea. Leaderboard may only contain 1 value for every player. It's not value per name, it's value per ID, your IP or something like that, idk exactly. If you update score from certain device even with different names it will just clear your previous score. Yeah, I know it was 4 months ago, but I hope it'll help you