First, we use a custom double opt-out unsubscribe for our enewsletters. (We don't use the system unsubscribe.)
I've built a custom HTML template with two dynamic blocks: at the top and in the footer.
Problem: Both the default (subscribers) & segment (non-subscribers) show the unsubscribe info.
Is your Snippet itself dynamic?
Yes. I've tested it multiple ways, but the unsubscribe snippet, which should only appear in the non-subscriber version, keeps appearing.