Draphsin, you're misinterpreting what the Databook is presenting. The page refers to Itachi because he was the only Susanoo wielder at that time. The last Databook at Itachi's death. That is why it only says Itachi. It is the matter of interpretation and who is looking at the context.@Madara rules:
Read the whole DB before making assumptions.
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This proves that if you believe sasuke & madara have ama & tsukuyomi then you also believe that their susanoo's wield both totsuka & yata which makes zero sense because there is only one yata & totsuka & their in itachi's possession.