I don't know if this is the case here, but I have witnessed several instances in the open source community where someone offer to help with a boring/fastidious task and some temporary admin privileges are granted to them in order to make it easier.
But then, temporary become permanent because either the task never complete or because people just forgot. It's always when the problems start to appear that the temporary privileges are finally revoked.
In my case the problems were mostly due to incompetence, but sometimes a malicious action happens...