No, I mean duplicates like you have two LCN2 channels. 2,21,22 etc are unique LCNs.
Also look for channels now at LCN350 onwards. These indicate an issue with receiving ABC channels from multiple locations. Perhaps the Wiz hasn't scanned the channels properly, and is adding/removing channels from the normal list with the DCM function (dynamic channel management)... a function you can actually disable in the Wiz setup menu.
By scan/rescan, I am referring to the act of going into the Wiz setup menu and scanning for channels... e.g after a factory reset, it won't have any channels in it, so you have to do a full scan. When you upgrade to 1.05.350, you also have to do a full scan so the Wiz has a good understanding of all the broadcasted channels, so that any future channel changes by the broadcaster can be automatically added to the Wiz channel tables using the DCM function (if you choose to leave it enabled).
Regards