OK, to give us a complete control group, I just downloaded a fresh ffiv 1.1 ROM (from doperoms), a fresh Namingway edition patch (from rhdn), and the desync fix patch (from a couple posts above here) onto my tablet, which had none of the above.
I patched Namingway onto the clean ROM and played a new game up to the first save point (in the watery pass).
I tested it out to make sure the desync would occur when dashing onto the save point. It did, specifically when approaching from above and from the right.
Then I saved, stopped the game, and applied the desync fix patch.
Then I loaded my game, tested it again, and the fix worked. I must have dashed onto the save point twenty times at least, and not one desync.