While it sounds very much like several characters are referring to the original Dr. Mid-Nite as "Doctor Midnighter," they are in fact saying "Doctor McNider." The real name of the original Dr. Mid-Nite is Doctor Charles McNider.
When Courtney walks down the street in Blue Valley, you can see the trees are in autumn colors and missing leaves. But it's supposed to be early summer, just after school has let out.