Неправильный вывод при написании SQL-запроса с использованием функций Postgis

Я делаю свою домашнюю работу, и я почти закончил с этим. Проблема в том, что последний запрос, который я правильно выполнил, должен возвращать только 10 строк, но то, что у меня сейчас есть, возвращает 16 строк, и я не могу понять, что я сделал неправильно. Определение запроса

Find all urban areas that (1) have a combined land & water area of greater than 1500 square
kilo- meters and (2) intersect multiple states. Your query should return the urban area name
(name10) and a count of the number of states intersected. The results should be first ordered by
the number of states intersected (in descending order) and secondarily by alphabetical order of
the urban area names from (A to Z). (Note: Pay very close attention to the units used for the
areas in this question.) (10 records)

SQL-запрос, который я написал, который возвращает 16 записей

SELECT area1.name10, COUNT(*) AS Count
FROM tl_2010_us_uac10 AS area1, tl_2010_us_state10 AS area2
WHERE ((area1.aland10 + area1.awater10)/1000) > 1500
AND ST_Intersects(area1.coords, area2.coords)
GROUP BY area1.name10 HAVING COUNT(*) > 2
ORDER BY Count DESC, area1.name10 ASC;

Две таблицы, которые я использую

Table "public.tl_2010_us_state10"Column   |            Type             |                            Modifiers
------------+-----------------------------+-------------------------------------
gid        | integer                     | not null default
region10   | character varying(2)        |
division10 | character varying(2)        |
statefp10  | character varying(2)        |
statens10  | character varying(8)        |
geoid10    | character varying(2)        |
stusps10   | character varying(2)        |
name10     | character varying(100)      |
lsad10     | character varying(2)        |
mtfcc10    | character varying(5)        |
funcstat10 | character varying(1)        |
aland10    | double precision            |
awater10   | double precision            |
intptlat10 | character varying(11)       |
intptlon10 | character varying(12)       |
coords     | geometry(MultiPolygon,4326) |

Indexes:
"tl_2010_us_state10_pkey" PRIMARY KEY, btree (gid)
"tl_2010_us_state10_coords_gist" gist (coords)

Тогда это таблица городской информации.

                                      Table "public.tl_2010_us_uac10"Column   |            Type             |                           Modifiers
------------+-----------------------------+-------------------------------------
gid        | integer                     | not null default
uace10     | character varying(5)        |
geoid10    | character varying(5)        |
name10     | character varying(100)      |
namelsad10 | character varying(100)      |
lsad10     | character varying(2)        |
mtfcc10    | character varying(5)        |
uatyp10    | character varying(1)        |
funcstat10 | character varying(1)        |
aland10    | double precision            |
awater10   | double precision            |
intptlat10 | character varying(11)       |
intptlon10 | character varying(12)       |
coords     | geometry(MultiPolygon,4326) |

Indexes:
"tl_2010_us_uac10_pkey" PRIMARY KEY, btree (gid)
"tl_2010_us_uac10_coords_gist" gist (coords)

заранее спасибо