I understand there isn't much to be done since apple doesn't work on GameCenter anymore. I'm wondering if there's a known bug with the daily leaderboards in a test flight. I'm testing my app in a test flight with game center and when I report a score it will go back to showing me the total score instead of the score gained today. I can't show the code because this isn't an Xcode project.
Testing Gamecenter in testflight
Please expand on what you mean by "total score instead of the score gained today". The leaderboard can be configured to rank by "best" score or "most recent". If "best" then whether the score is "higher" or "lower". Leaderboards don't track increments of scores.