Unmuting people muted by default (terrorists, dead people) doesn't display a message in chat. This leads to immediate confusion for the player, the admin and everybody else as to whether or not they are unmuted. Muting and gagging people defaults to 30 minutes, but they get unmuted at the start of the round. Either the messages/defaults should be fixed or they should remain muted. I've heard that muting someone twice unmutes them.