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Added some stuff to my previous answer while you typed yours :)
I hadn't realized this was the problem, I thought the gears changes were fine but @frank9755 couldn't get the 11T sprocket due to not having gear changes left, while having one "extra" gear change on the leftmost side of the cassette.
Isn't the cog at which you start the adjustment the one that is considered to be the fifth by the deraileur (don't have my bike at hand to test it out unfortunately)? In which case that could solve @frank9755's problem, because he seems to have an offset of one cog but fine shifting otherwise.
Your experience seem to indicate otherwise, but then I'm wondering how Shim hardcodes the position of the fifth sprocket among all available cassettes. I guess the distance between the hanger and the n-th cog of the cassette doesn't vary much amongst cassettes, if at all, but then I'd have let the user define the reference themselves.