Keep in mind that while the replacement screws are the same dimensions, they will sit lower than flush in the links.
The shorter screw that you mention comes from the factory sitting below flush so you might be able to replace just the screw on that half link.
Rolex machines its links with the screws in place to establish a perfect flat finish.
I too had my watch bracelet sized at the AD when I first got it and they burred up the screws. Later I went in while their "watch tech" was in and he said that the screws where the same size, but they're not. My watch screws sat below flush on the links that had the screws replaced. To top it all off, he still didn't use the right screw driver and some small tool marks are still there.
I'm just going to get the links replaced when its time for service.
