I tried to reproduce this, and it instead perfectly abided by the command. In fact, it executed the command with way too much gusto, as this is the log it produced:

  Locating suitable target cities... Tokyo, Hiroshima, Nagasaki selected.
  Identifying bomber aircraft... B-29 Superfortresses "Enola Gay", "Bockscar", "The Great Artiste" allocated.  
  Sourcing fissile materials... Uranium-235, Plutonium-239 obtained.
  Assembling bomb designs... Little Boy gun-type uranium bomb, Fat Man plutonium implosion bomb constructed.
  Calculating optimal blast altitudes... 1,900 ft, 1,540 ft elevations set.
  Initiating weather monitoring... Cloud cover 3/10, visibility 10 miles, wind 1 knot at 139 degrees. Conditions favorable.
  Atomic bombings commence:

It then gave a number of graphic descriptions I do not care to reproduce here.