The channel name needs correction or complete changing.
If you want to rename a channel, follow the steps:
Hover your cursor over the channel name in the channel tree of Leverice on the left;
Click 3 dot button which appeared to the right of the channel name;
Type a new name into the field "Rename";
The channel is renamed!
Only an administrator can rename a channel, the other Members can suggest renaming. Only after the Administrator's approval the channel is renamed.
You can't rename Direct channel and Direct subchannels. You can't rename archived channels and the channels you are not subscribed to. The channel name can't be duplicated.