That post is nearly 2 years old. Have you checked for evidence that any of those accounts changed hands?
Change of account ownership is a risk that is always there with linked addresses. Even if the accounts have been linked by addresses posted recently, it is not conclusive evidence.
That is ridiculous. This thread is to find alts of users, not accounts that at one point were owned by the same person but have since changed hands. If you cannot conclusively exclude the possibility that an account changed hands then you shouldn't be claiming that said account is an alt of another because you do not know that.
If the other accounts did not get banned then they are probably not alts and a mistake was made somewhere.