Participants taking host

Hi, 

I'm using zoom to run an online summer camp.  And we have a producer who hosts all the live workshops.  Participants are logging in to the workshops and taking host from our producer.  It is random and randomly our producer gets host back.  Sometimes they get co-host when they log in.  My settings are that co-host is not enabled.  So I'm not sure why this is happening. 

Help!

Thanks