Anyone having accomplished a PB (Personal Best) time on any level, while the Leaderboards were not working properly, will simply have to just complete the level(s) again, for their times/ranks to be updated. It doesn't matter what the end time is, as long as its a completion. The leaderboard will then update the time/rank to the "PB" time. This will also have the benefit of updating your Mission Totals difficulties to the proper time/rank by doing so.✌🏻