Okay...so I'm still confused...
Are duplicated Channels bad? I mean, can they brick my wii with future updates? also if somebody clicks on them and tries to enter, it will damage my chip or wii?
I just want to be 100% sure of what I'm going to do, just to not have any bad surprises coming.
duplicated Channels = channel that you cannot use it. It will show you error if you start that channel. It mean you got 2 more useless channels but you don't have any other firmware update problem.
I have Wii Japan + wiikey and got duplicated channels from Metroid Prime 3. It works fine.