Joining more than 5 channels creates duplicated join requests

[Caisesiume]

Description of bug: If you have more than 5 channels that you want the bot to join from the json file. All channels after the 5 first join attempts will be joined twice.

Idea Solution: The problem is happening somewhere after splitting channels to join into a two-dimensional array. Could either be in ChannelConnection.js or in any related utils/