Oh I see.
@jellyvine - you have to be careful when you post something on a community.
Each community has their own rules & if you don't follow, they can mute you.

On HiveSuite, we always inform users about the community rules.

when you go to post creation page & select a community, it gives you a pop-up of the rules.
check following screenshots

Hope you got the idea
You may have accidentally broken a rule of that community