Hey,
If I have an image with more than 9, it shows them in the wrong order which becomes an issue when exporting to an ESD/WIM, as they are exported in the wrong order.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 is listed as 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9.
My experience is that's how Windows does...