Shouldn't be disambiguate-add-year-suffix set to false instead of true? Because <if disambiguate="true"> validates only true if there are still ambiguous values "after applying the selected disambiguation methods", but disambiguate-add-year-suffix will always disambiguate ambiguous citations (if there is a year), in this case to Doe et al. (2000a); Doe et al. (2000b).
Issue #10 new