Duplicate houses in FIAS?

Question

MySQL

Here is an excerpt from the database of houses, both belong to Basovskaya Street.
If there was a building or structure, it would be clear, but in this case it is not clear what is the difference?

$house = array(
  array( 
    'aoguid' => '509b1ca1-fcd5-44b5-9de3-28192e6a3fb3',
    'buildnum' => '',
    'enddate' => '20131001',
    'eststatus' => 2,
    'houseguid' => 'dd06963f-25b5-4003-b4d9-006e7aeff42a',
    'houseid' => 'dd06963f-25b5-4003-b4d9-006e7aeff42a',
    'housenum' => '3',
    'statstatus' => 3,
    'ifnsfl' => '7721',
    'ifnsul' => '7721',
    'okato' => '45290578000',
    'oktmo' => '45392000',
    'postalcode' => '109202',
    'startdate' => '19000101',
    'strucnum' => '',
    'strstatus' => 0,
    'terrifnsfl' => '',
    'terrifnsul' => '',
    'updatedate' => '20131001',
    'normdoc' => '',
    'counter' => 3,
  ),
  array
    'aoguid' => '509b1ca1-fcd5-44b5-9de3-28192e6a3fb3',
    'buildnum' => '',
    'enddate' => '20790606',
    'eststatus' => 2,
    'houseguid' => 'dd06963f-25b5-4003-b4d9-006e7aeff42a',
    'houseid' => '0d6c5fc4-003f-4b45-b87a-4336ff59ddd3',
    'housenum' => '3',
    'statstatus' => 0,
    'ifnsfl' => '7721',
    'ifnsul' => '7721',
    'okato' => '45290578000',
    'oktmo' => '45392000',
    'postalcode' => '109202',
    'startdate' => '20131001',
    'strucnum' => '',
    'strstatus' => 0,
    'terrifnsfl' => '',
    'terrifnsul' => '',
    'updatedate' => '20131113',
    'normdoc' => '',
    'counter' => 23,
  ),
);

Answer 1

startdate
enddate