The problem with a selection of slides like 1, 2, 3, 4, 5, 6, 7, 8 appearing as 8, 1, 2, 3, 4, 5, 6, 7 is NOT due to SY(P). This is a windows issue. Try it in something like PaintShop Pro. Select 8 images and open them. They will open in the order of 8, 1, 2, 3, 4, 5, 6, 7.