I've seen a number of questions (like this one) that have been moved between sites where the user is greyed out. As far as I can work out this means that there's no matching account on the new site.
In this case the OP has got an account here on MSO and has linked his(?) other accounts, but the question is still "ownerless".
Is this because the MSO account didn't exist when the question was moved. But when the user created the MSO account the system couldn't assign the question to that account.
Wouldn't it be better to create a linked account on the target site but leave it dormant and only activate it when the user logs in? It would probably require that the user uses the same OpenID.