拖拽多张图片上传，为什么图片名字和图片对不上？

如题，我当我拖拽超过2张图片的时候，名字和图片就对不上了，哪出错了呢？

HTML:

<div class="wrap">
    <div class="drop-box">请拖拽上传</div>
    <ul class="img-list"></ul>
</div>

CSS:

*{padding:0;margin:0;}
ul { list-style: none; } 
li { width: 150px; height: 150px; margin-right: 10px; float: left; } 
li img { width: 100%; height: 100%; border-radius: 5px; border: 1px solid #ddd; } 
.drop-box { clear: both; width: 200px; height: 200px; line-height: 200px; border: 2px dashed #aaa; margin-bottom: 100px; text-align: center; } 
.image{margin-bottom: 10px;} 
.title{ text-align: center; }

JS:

var box = document.querySelector('.drop-box');
var flag = false;
var iNow = 0;

box.ondragover = function(e){
    e.preventDefault();
    this.innerHTML = '请松开鼠标';

}
box.ondragleave = function(){
    this.innerHTML = '请拖拽上传';
}

box.ondrop = function(e){
    var files = e.dataTransfer.files;
    var imgList = document.querySelector('.img-list');
    var pList = [];
    var item;
    var file;

    e.preventDefault();
    this.innerHTML = '请拖拽上传';
    
    for (let i = 0; i < files.length; i++) {
        var p;
        var fileReader = new FileReader();
        fileReader.readAsDataURL(files[i]);
        file = files[i];

        p = document.createElement('p');
        p.className = "title";
        p.innerHTML = file.name;
        pList.push(p);

        fileReader.onload = function(e){
            
            var url = this.result;
            var str = `<li class="item">
                            <img class="image" src=${url}>
                        </li>`;
            imgList.innerHTML += str;
            item = document.querySelectorAll('.item');

            if (!flag && pList.length == item.length){
                iNow = item.length;
                flag = true;
                for (let j = 0; j < item.length; j++) {
                    item[j].appendChild(pList[j]);
                }
            }else if(flag && pList.length == item.length - iNow){
                for (let j = 0; j < pList.length; j++) {
                    item[iNow + j].appendChild(pList[j]);
                }
                iNow = item.length;
            }
        }
    }
}