When I pull 10 mobs, I get 10 "frost nova" CC bars. Can you add an option to limit bars shown to just 1? It clutters the screen. Thanks for your great work!

This is due to the latest tracking improvement where tracking is based on the combat log directly and only spell rank and id are taken from the unit cast events. I remember someone complaining about only seeing one before, though I agree it's too much noise like this. I don't like the idea of limiting it to one randomly. I think I'm gonna add a setting to show aoe only for the target. Meanwhile you can use /ccc ignore Frost Nova if it bothers you.

I uploaded a new version which only shows aoe on the target (or last target if no target) by default.
You can change the setting with /ccc aoe target, /ccc aoe all