I agree with the manuals being wrong.
I have been caught out by this before. I had ordered a rubber kit for a pin and found incorrect rubbers and rubbers missing.
After having a winge and a whine at the supplyer about the rubbers I found myself with egg on my face when I read the rubber list in the manual.
As Strangeways does (but i don't find it to be a strange way of re rubbering pins,
) I also keep a lot of the common sizes.
And just order the ones that arn't so common & are needed to re rubber the pin that i am doing with an extra 5 or so in case I miss one or two hidding in dark corners of the playfield.