WP several meta_query matches, and double counted - wordpress

Question

I set following meta_query.
I like to add one more condition.
My problem is that the article which matches both meta_query conditions are double counted by count(get_posts on the end of line.
Is it possible to add condition like this? If both 1bb and 1aa matches, count it as if only 1bb matches.
<?php
$args = array(
'category_name' => $cat,
'posts_per_page' => -1,
'post_type' => 'post',
'post_status' => 'publish',
'meta_query' => array(
'relation' => 'or',
array(
'key'=> '1bb',
'value' => array($from , $to),
'compare' => 'BETWEEN',
'type' => 'DATE',
),
array(
'key'=> '1aa',
'value' => array($from , $to),
'compare' => 'BETWEEN',
'type' => 'DATE',
),
),
);
echo count( get_posts( $args ) );
?>
Thank you.
The following is additional code that I tried to prevent from double counting.
Its too long time to load, and can not use it.
'meta_query' => array(
'relation' => 'or',
array(
'relation' => 'AND',
array(
array(
'key'=> '1aa',
'value' => array($from , $to),
'compare' => 'BETWEEN',
'inclusive' => 'true',
'type' => 'DATE',
),
array(
'key' => '1bb',
'compare' => 'NOT EXISTS',
),
),
),
array(
'relation' => 'AND',
array(
array(
'key'=> '1bb',
'value' => array($from , $to),
'compare' => 'BETWEEN',
'inclusive' => 'true',
'type' => 'DATE',
),
array(
'key' => '1aa',
'compare' => 'NOT EXISTS',
),
),
),
array(
'relation' => 'AND',
array(
array(
'key'=> '1bb',
'value' => array($from , $to),
'compare' => 'BETWEEN',
'inclusive' => 'true',
'type' => 'DATE',
),
array(
'key' => '1aa',
'compare' => 'EXISTS',
),
array(
'key' => '1bb',
'compare' => 'EXISTS',
),
),
),
),