Note their colour, so that you can replace the dark screws at the bottom and the bright screws at the top of the bucket.

Click to expand...

Actually, with the screws in my two Mac Pluses one has one colour with tight threads at the top and the other colour with loose threads at the bottom while the other Plus has one colour with loose threads at the top and the other colour with tight threads at the bottom.So instead of summing them all up with one colour at the top and the other at the bottom the person taking things apart should really just remember what came out of where. It is not hard if you keep all your screws organized.

And yes, I am sure they came that way.