Queries fix for Flexible theme

custom_functions_fix.php

<?php

add_action( 'pre_get_posts', 'et_custom_posts_per_page' );
function et_custom_posts_per_page( $query ) {
	global $shortname;
	
	if ( is_admin() ) return $query;
	
	if ( $query->is_main_query() && $query->is_category ) {
		$query->set( 'posts_per_page', et_get_option( $shortname . '_catnum_posts' ) );
	} elseif ( $query->is_main_query() && $query->is_tag ) {
		$query->set( 'posts_per_page', et_get_option( $shortname . '_tagnum_posts' ) );
	} elseif ( $query->is_main_query() && $query->is_search ) {
		if ( isset($_GET['et_searchform_submit']) ) {			
			$postTypes = array();
			if ( !isset($_GET['et-inc-posts']) && !isset($_GET['et-inc-pages']) ) $postTypes = array('post');
			if ( isset($_GET['et-inc-pages']) ) $postTypes = array('page');
			if ( isset($_GET['et-inc-posts']) ) $postTypes[] = 'post';
			$query->set( 'post_type', $postTypes );
			
			if ( isset( $_GET['et-month-choice'] ) && $_GET['et-month-choice'] != 'no-choice' ) {
				$et_year = substr($_GET['et-month-choice'],0,4);
				$et_month = substr($_GET['et-month-choice'], 4, strlen($_GET['et-month-choice'])-4);

				$query->set( 'year', absint($et_year) );
				$query->set( 'monthnum', absint($et_month) );
			}
			
			if ( isset( $_GET['et-cat'] ) && $_GET['et-cat'] != 0 )
				$query->set( 'cat', absint($_GET['et-cat']) );
		}
		$query->set( 'posts_per_page', et_get_option( $shortname . '_searchnum_posts' ) );
	} elseif ( $query->is_main_query() && $query->is_archive ) {
		$query->set( 'posts_per_page', et_get_option( $shortname . '_archivenum_posts' ) );
	}

	return $query;
}

?>