Got the same problem.
https://forums.alliedmods.net/showthread.php?t=240295
Just saw your post right now. Seems noone can help with that, or I suppose you would already got an answer. Which means I will also get no help with that.
Funny, such a big forum with so many people using these Plugins, I am sure quite many use Sourcebans. And you would think others than us encountered that problem as well. But since we're not getting any help with that, I can just assume people mostly care about their own problems. Once thats solved, they dont need to help others.
Shame.