Best explained by a screenshot. How is 58.7 new/improved over 58.5?
This is on Map 2560 if relevant
It may be that you have not submitted the previous best time?
I did. You can see the 58.5 there on the scoreboard.
Also why are both scores equal to 9839? Is there something about scoring I don't understand.
The scoring may not change with every 0.1 seconds. Your scores are the same, so that may be triggering a ">=" check for that "new improved" message.