Keith, Funny you should think that. When I reinstalled Prudence's rear wheel in Helena, I observed that little spacer that goes between the wheel and carrier hub was on the floor of Geno's garage! (
Internal Spacer #20 per the bandit) Dang. First time I forgot that! Of course I couldn't get the freaking wheel lined up again in the dropouts for the life of me after I removed the wheel to install that baby axel.

The spacers otherwise are observable whilst the wheel is bolted up to the swingarm drop outs. The flat sided one (looks like a top hot) is on the left while the hollow tube is on the right. Also ensure the rear brake caliper mounting bracket is on it's swingarm slot.
Another thing to consider...Cinnamon Girl. Lou and I changed out her rear tire. Then I noticed a wierd sound. Like a baby chirp at slow speeds. Even when we jacked her up and spun the wheel we heard it. Thought all of the bads things. Then said wth and dropped the wheel. Looked at everything and reinstalled the rear wheel. NO MORE CHIRP. Didn't do a thing except remove and replace. Strange.