There were people who had taken it on themselves to get involved in church business. The chapter tells us that they weren’t authorised by anyone and all they did was to cause confusion and upset others.
You really do have to be wary of people like that. It may appear that they’re acting on initiative and have the common good at heart, but that’s not the case.
In reality they’re loose cannons, they not accountable to anyone and always end up leaving a trail of destruction behind them. Whether in church or life in general, watch out for these people. They’re trouble!