UBB.threads PHP Forum Software Community Forums UBB.threads 7 Bug Reports Groups with -1 not playing ball

I have a group called 'trouble makers' that has lots of -1's. Generally members are confined to a 'naughty boys' room where a discussion is set up between them and the mods. I have two issues:

1/ One of our trouble makers succeeded in making a post somewhere that he had a -1 override for

2/ Teaser forums are still being displayed.

Although 2/ is designed behaviour, I believe 1/ really isn't and I suspect it might have something to do with 2/. Anyone who can look into the issue?

A good starting point would be to provide the url to the forum.
Also opening a support ticket might be helpful.
I would suspect that the member is in multiple groups that might be causing the issue.