I don't believe that is satisfactorily disproving this position. It is very very easy to believe that the automated system trying to prevent lazy formatting is just interpreting a large prevalence of hyphenated words as line break hyphens.

Graeme merely asserts that his book was free of those, which we knew going in. It does nothing to say why Amazon was raising the issue, and it wouldn't shock me that an automated system would be unable to tell the difference.