Q: How do we add another instructor to the course, and have them notified in the same way as the first instructor?
A: Currently, there is no way to add multiple instructors to a class, however, to accomplish almost the same thing, you could a to create a group in LMScheckout and add their instructors to it using the confirmation and reminder email templates within Class Settings. This function only exists in the class settings area. It is not on the Message Templates screen. A group can then be added to the BCC of the emails to those instructors the admin want to these notifications. In this scenario, each person in the group would get their own email and not have to rely on an email distribution list.
There should be a link just below the field that says "add groups". If you click that, it will give you a dropdown where you can pick the group name.