Gary - both of my "washers" (spacers really) are angled. These are the thick spacers that sit against the paint in your picture. It is difficult to be certain, but it appears that your larger shaft (main blade) has an angled spacer against the paint. The smaller shaft might also. By rotating these spacers one changes the geometry of the blade such that it can be adjusted to wipe smoothly against the glass.
I have attached pictures.
Jim S.