If you import a contact that is considered "subscribed" on the Wix side, then it will be considered subscribed. If the contact being imported isn't considered subscribed on the Wix side, then it will import as no permissions set. If the contact already exists as subscribed in your Constant Contact account then it shouldn't be overwritten as "no permissions set," since that's meant only for contacts that do not have any permissions.
If you feel like there's been an error during the syncing, then I'd advise calling general support so the Tier 2 integrations team can troubleshoot with you.
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