-Fixed join order in queries

src/QueryBuilder.php

@@ -406,7 +406,7 @@ class QueryBuilder implements Query\QueryBuilderInterface
         $sql = [];
 
         usort($this->queryStack, function($q1, $q2) {
-            return (float) $q1->order <=> (float) $q2->order;
+            return (float) $q1->order() <=> (float) $q2->order();
         });
 
         foreach($this->queryStack as $fragment) {