To cut to the chase, we were recently re-organising one of our Groups and when we deleted a roleset (with no powers, the second lowest role in the group) one individual was promoted to the third highest role within the group, they were within the deleted roleset prior.
On the group page itself it showed him to be in the correct roleset, it was only on his profile that it showed he was indeed within the wrong role. He had all of the permissions that someone would have being placed in the higher role, both on the group admin page and games that involved the group in some form.
We only knew this had happened when the account holder actually got in contact with us and alerted us of the problem before leaving the group and rejoining to fix the issue. - As far as I’m aware this hasn’t been reported before, hopefully it’s just a one off case but I’d still recommend checking peoples profiles within your groups if you have the ability to as again we only found this out due to the account holder alerting us.