Same reason as before, the dates are not really dates, they're just text strings.
But in this case, they do appear to be sorted chronologically.
Because of the consisitent format always using 2 digit month and 2 digit day.
So 0 comes before 1, so the months are sorted corrrectly.


But anyway, to convert them to real dates is easier on this file, also because of the consisitent format..
=DATE(RIGHT(A2,4),LEFT(A2,2),MID(A2,4,2))