Instagram API响应-阵列长度奇怪

我收到了Instagram API的回复,结果遇到了麻烦。在检查重复项之后,我只是将每个标记调用响应的数据对象推送到我的空结果数组中。

我的控制台截图如下。

奇怪的是,结果是这样的。在for循环检查重复项时,长度似乎正常工作。

            var token = 'MY_TOKEN',
                userid = MY_ID,
                num_photos = 33,
                hashtags = ['website', 'engraving', 'weddinginvitations', 'customstationery'],
                results = [],
                test_results = [{id:1},{id:2},{id:3}]; 

            // LOOP THROUGH EACH HASH
            for(i = 0; i < hashtags.length; i++){
                // MAKE AJAX CALL PER HASH
                $.ajax({
                    url: 'https://api.instagram.com/v1/tags/' + hashtags[i] + '/media/recent',
                    dataType: 'jsonp',
                    type: 'GET',
                    data: {access_token: token, count: num_photos},
                    success: function(response){
                        // CHECK EACH IMAGE IN THE RESPONSE DATA AND REMOVE DUPLICATES
                        for( x in response.data ){
                            var exists = false;
                            for(var i=0;i<results.length;i++){
                                if( results[i].id === response.data[x].id ){
                                    exists = true;
                                    break;
                                }
                            }
                            if(exists === false){
                                results.push(response.data[x]);
                            } 
                        }
                    },
                    error: function(data){
                        console.log(response);
                    }
                }); 
            } 


            console.log(results);
            console.log(results.length);

            console.log(test_results);
            console.log(test_results.length);