Hey,
So I was relaying the information a client was feeding me while they were testing. I don't think the success after the failure when dealing with the error of "post_logout_redirect_uri_not_associated_with_client" is happening, actually. So, this does not seem to be a problem.
The problem still persists in the known bug, as you guys have said, with getting the "post_logout_redirect_uri_not_included", etc.
Thanks,
Josh N.