SetSortMode in sphinx not working with delta index - sphinx

Question

So my sphinx.conf file contains something similar. Basically I am using delta index to make things quick.
source main
{
#...
sql_query_pre = SET NAMES utf8
sql_query_pre = REPLACE INTO sph_counter SELECT 1, MAX(id) FROM photo
sql_query = \
SELECT p.id AS id, p.search AS search, COUNT(li.id) AS total_likes \
FROM `photo` p \
LEFT JOIN `like` li \
ON p.id = li.photo_id \
WHERE p.id <= ( SELECT max_doc_id FROM sph_counter WHERE counter_id=1 ) \
GROUP BY \
p.id
#...
sql_query_info = SELECT * FROM photo WHERE id=$id
}
source delta : main
{
sql_query_pre = SET NAMES utf8
sql_query = \
SELECT p.id AS id, p.search AS search, COUNT(li.id) AS total_likes \
FROM `photo` p \
LEFT JOIN `like` li \
ON p.id = li.photo_id \
WHERE p.id > ( SELECT max_doc_id FROM sph_counter WHERE counter_id=1 ) \
GROUP BY \
p.id
}
And in the php when I retrieve data I also want to have some sort of sorting methods.
$s->SetSortMode(SPH_SORT_EXTENDED, '#relevance DESC, total_likes DESC, #id DESC');
$result = $s->Query($data['query'], "delta main");
Sorting was working fine when I had only main index. But now when I search with both indexes, results from the delta index is appended at the front. What I actually want is results from both indexes are fetched and then sorted according to preferences i.e. #relevance DESC, total_likes DESC, #id DESC in my case. That is total_likes should be given preference over id

Answer 1

Thanks #barryhunter for the solution. The solution was that in the delta index second sql_query_pre had to be overwritten.
sql_query_pre = SET NAMES utf8
sql_query_pre =
sql_query = \