I have multiple channels on the same email, but every time I try to log in to Nightbot, it joins the wrong channel (the default one that YouTube always recreates). In the attached screenshot, the channel highlighted in red is the one YouTube always creates, while the selected channel is the main one (even though the configuration indicates that it is the channel set as the main one and the one I want to log into)
When you log into Nightbot Login via YouTube you can select the account that Nightbot will use/join the chat into. You might need to log out of Nightbot if the incorrect account is selected.