Are there going to be two 12 o clocks tonight

No, but there will be two 1 am, because the clock is supposed to be set back to 1am standard time at 2 am DST, NOT 3 AM.

"...Nov 6 at 06:00:00 Sun 2:00 AM back to Sun 1:00 AM Canada - Some of locations observing DST Montreal (Quebec)
Ottawa (Ontario)
Québec (Quebec)
Toronto (Ontario)
The Bahamas - All locations Nassau
Turks and Caicos Islands - All locations Cockburn Town
United States - Some of locations observing DST Atlanta (Georgia)
Augusta (Maine)
Baltimore (Maryland)
Boston (Massachusetts)
Charleston (West Virginia)
Columbia (South Carolina)
Columbus (Ohio)
Concord (New Hampshire)
Detroit (Michigan)
Hartford (Connecticut)
Indianapolis (Indiana)
Louisville (Kentucky)
Miami (Florida)
Montpelier (Vermont)
New York (New York)
Philadelphia (Pennsylvania)
Raleigh (North Carolina)
Richmond (Virginia)
Washington DC (District of Columbia)
Nov 6 at 07:00:00 Sun 2:00 AM back to Sun 1:00 AM Canada - Some of locations observing DST Winnipeg (Manitoba)
Mexico - Some of locations observing DST Matamoros (Tamaulipas)
United States - Some of locations observing DST Austin (Texas)
Bismarck (North Dakota)
Chicago (Illinois)
Dallas (Texas)
Des Moines (Iowa)
Houston (Texas)
Jackson (Mississippi)
Lincoln (Nebraska)
Little Rock (Arkansas)
Madison (Wisconsin)
Minneapolis (Minnesota)
Montgomery (Alabama)
Nashville (Tennessee)
New Orleans (Louisiana)
Oklahoma City (Oklahoma)
Sioux Falls (South Dakota)
St. Louis (Missouri)
St. Paul (Minnesota)
Topeka (Kansas)
Nov 6 at 08:00:00 Sun 2:00 AM back to Sun 1:00 AM Canada - Some of locations observing DST Calgary (Alberta)
Edmonton (Alberta)
Yellowknife (Northwest Territories)
Mexico - Some of locations observing DST Ciudad Juárez (Chihuahua)
United States - Some of locations observing DST Albuquerque (New Mexico)
Billings (Montana)
Boise (Idaho)
Cheyenne (Wyoming)