SELECT statement working when testing but not in Bindings Panel

I have created a SELECT statement in the Advanced area and when I press the Testing button it works perfectly but if I click ok I see other fields selected in the Bindings panel. Why isn't this working in the Bindings panel? It is not selecting the outer statement just the one between parentheses.

SELECT cit.city, providd.base_city
FROM (

SELECT prov.id AS prov_id, prov.company_name, prov.description AS prov_description, prov.photo, prov.base_city, prov.facebook, prov.twitter, cat.id AS cat_id, pcc.city_id
FROM  `providers`  AS prov
LEFT  JOIN  `provider_city_category`  AS pcc ON prov.id = pcc.provider_id
LEFT  JOIN  `categories`  AS cat ON pcc.category_id = cat.id
WHERE cat.id =7
AND pcc.city_id =1) AS providd, cities cit
WHERE providd.base_city = cit.id
LIMIT 1

When I test I see selected:

the cit.city and providd.base_city

(just as I want)

But if I save and look in the Bindings Panel I have these fields:

prov_id

company_name

prov_description

photo

base_city

facebook

twitter

cat_id

city_id

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I'm using DW CS6