We might have a case of overlapping valid challenges going on. Both Incorrect Submission and Duplicate challenges have strong arguments supporting them. It's important to note that [1] arguments supporting both types of challenges contain common elements, [2] multiple rulings over a case are not possible, only 1 challenge can be accepted and [3] the penalty that a Duplicate gets is different than the one an Incorrect Submission gets (in the former, the voucher is removed).

For this reason, I think that the most broad and severe challenge type should take precedence. In other words, Incorrect Submission should be dismissed in favor of Duplicate. The policy doesn't explicitly mention this, but I believe this is common sense in any legal system.

What the policy does state about Incorrect Submission challenges is that "This kind of challenge does not claim that the submitter is trying an attack, but just that the submission does not comply with the submission rules". As explained in cases 829, 830 and 831, this is an attack to the registry.