Default space type in get_space_types_from_building_type

[mioruggieroguida]

I am using the get_space_types_from_building_type from OsLib_ModelGeneration to determine typical space ratios.

I have noticed that in the SecondarySchool and PrimarySchool building types (I haven't checked them all), multiple space types are set as default. For example here

if building_type == 'SecondarySchool'
  if ['DOE Ref Pre-1980', 'DOE Ref 1980-2004', 'ComStock DOE Ref Pre-1980', 'ComStock DOE Ref 1980-2004'].include?(template)
    hash['Auditorium'] = { ratio: 0.0504, space_type_gen: true, default: false, story_height: 26.0 }
    hash['Cafeteria'] = { ratio: 0.0319, space_type_gen: true, default: false }
    hash['Classroom'] = { ratio: 0.3528, space_type_gen: true, default: true }
    hash['Corridor'] = { ratio: 0.2144, space_type_gen: true, default: false, circ: true }
    hash['Gym'] = { ratio: 0.1009, space_type_gen: true, default: false, story_height: 26.0 }
    hash['Gym - audience'] = { ratio: 0.0637, space_type_gen: true, default: false, story_height: 26.0 }
    hash['Kitchen'] = { ratio: 0.0110, space_type_gen: true, default: false }
    hash['Library'] = { ratio: 0.0429, space_type_gen: true, default: false }
    hash['Lobby'] = { ratio: 0.0214, space_type_gen: true, default: false }
    hash['Mechanical'] = { ratio: 0.0349, space_type_gen: true, default: false }
    hash['Office'] = { ratio: 0.0543, space_type_gen: true, default: false }
    hash['Restroom'] = { ratio: 0.0214, space_type_gen: true, default: false }
  else
    hash['Auditorium'] = { ratio: 0.0504, space_type_gen: true, default: false, story_height: 26.0 }
    hash['Cafeteria'] = { ratio: 0.0319, space_type_gen: true, default: false }
    hash['Classroom'] = { ratio: 0.3041, space_type_gen: true, default: true } 
    hash['ComputerRoom'] = { ratio: 0.0487, space_type_gen: true, default: true }
    hash['Corridor'] = { ratio: 0.2144, space_type_gen: true, default: false, circ: true }
    hash['Gym'] = { ratio: 0.1646, space_type_gen: true, default: false, story_height: 26.0 }
    hash['Kitchen'] = { ratio: 0.0110, space_type_gen: true, default: false }
    hash['Library'] = { ratio: 0.0429, space_type_gen: true, default: false }
    hash['Lobby'] = { ratio: 0.0214, space_type_gen: true, default: false }
    hash['Mechanical'] = { ratio: 0.0349, space_type_gen: true, default: false }
    hash['Office'] = { ratio: 0.0543, space_type_gen: true, default: false }
    hash['Restroom'] = { ratio: 0.0214, space_type_gen: true, default: false }

both ClassRoom and ComputerRoom have default set to true. The same happens for PrimarySchool.

Is this a bug or have I misunderstood the meaning of the default key?

I have tested and the second space type set to true is the one that is assigned to every space.