Question about shift-C key binding

[Treesh]

Another thing, although only minor related, why is it that extra chat windows disappear? I usually create a window where I can monitor my healing and spell damage output. Sometimes these windows are just gone, even with locked chat settings.

That's a bug that you can stop by unchecking the "auto-join guild recruitment channel" in the interface options. Once I remember to uncheck it with all my characters, the chat windows disappearing never pops up again.