IRISHPUNK:Shot 57 and it stayed the same.
You have been a TL for a year now, with a 59.49 average. Is it saturated or not?
To ease up the estimate I suppose that it might not be saturated but not far away.
So, you scored 2.5 shots below your average. This might have droped your average of 499 rounds by 2.5/490 = 0.0051 - not unlikely that the changing average would be displayed as the same, due to rounding.