I don't think it's a user error. I don't know how I would make an error there. Also, the only thing I changed for it to come to the same conclusion as myself was setting the analysis level to grandmaster instead of expert.
(esconder) Mantenha a sua Caixa de Mensagens limpa, Arquivando mensagens importantes e usando regularmente a opção "Apagar TODAS as Mensagens". (pauloaguia) (mostrar todas as dicas)