The only thing which determines the save's placement is its file name. E.g.I want to know how you can move all the saves, to take advantage of those 8 extra save slots per page? Just being able to do that, would almost halve the number of pages I'm currently using.
14-9-LT1.save will place the save on page 14 in slot 9. So the fastest way would be to rename your saves (in the folder where they're stored) to fit in the new slots.It's still quite tiresome, but faster than moving them manually with load/save from within the game.