On one of my CC servers, every listener is showing up twice on the list of current listeners. It's the same IP and all. Why?

Are you using a recent Centova Cast build? This should have been fixed in our update from August 23.

Hello DanielFrank,

This has been confirmed as a bug that affects Icecast stations using custom fall-back mount-points instead of the defaults setup by Centova Cast.

Our developers are already working on a patch, and it should be released along with the next build.