Howdy,
The dates in the 'Modified' column look like
Wed, 31 May 2017 19:57:53 GMT
So when they are sorted in reverse order, entries prefixed with 'Wed' show up first, with 'Fri' entries being last. Vice versa for normal order.
My expectation is that they would sort according to
YYYY-MM-DDTHH:MM:SS
instead.
Cheers!
Diab