Hi Josh,
Unless you upgraded from a very old version you should not have had to create that role as it is created by default.
Note that if you made any typos when creating that role and then edited it again to fix the name, it did not really fix it because there is a distinction between role name and role display name. When you initially create a new role the role name and display name are the same, but once a role is created the role name never changes even if you change the display name. This makes it possible for example for people to localize the display of the Administrators role and other built in system roles without breaking functionality. So if you did have to edit that role then you should just delete it and create it again making sure you name it exactly as "Newsletter Administrators", but again on newer installations this role should already exist.
Hope it helps,
Joe