Blacklisted User Receiving Mail

I stumbled upon a problem with our phplist installation (currently 3.2.7, update is already scheduled):

Our latest newsletter was sent to blacklisted users!

For several users, I see a green thumbs up when browsing through the recipient list, and a red thumbs down when I search for those users.

I see no significant difference in the user details, yet some of them receive mails, others not.

Does anybody have any idea on where to look?

Thanks,

Alexander

Some research turned up a little bit of new information:

  • users that where blacklisted due to unsubscription didn’t receive mail
  • users that where blacklisted due to bounce count did.

This is odd, can you take some screenshots to show the different results for a subscriber?