Backbone js显示旧的模型

我是新的骨干，现在有骨干js和骨干验证的问题。下面是我的代码:

var EmployeeCreateView = Backbone.View.extend({
    el: "#page_content",
    initialize: function() {
        console.log("initializing....");
        this.model = new EmployeeModel();
        console.log(this.model);
        this.render();
    },
    render: function() {
        Backbone.Validation.bind(this);
        this.$el.html(EmployeeCreateTemplate);
    },
    events: {
        "click #submit-employee": "submitEmployee"
    },
    submitEmployee: function(e) {
        e.preventDefault();
        var data = Backbone.Syphon.serialize(this);
        this.model.set(data, { validate: true });
        console.log(this.model);
        if (!this.model.isValid()) {
            _.each(this.model.validationError, function (error) {
            });
        } else {
            this.model.save(null, {
                success: function() {
                    new EmployeeCollectionView();
                },
                error: function(model, response) {
                    this.$el.html(ErrorTemplate)({
                        error: response.responseText
                    });
                }
            });
        }
    }
});

发生的事情是，当我进入这个页面时，console.log()都显示一个模型，这很好。但是，当我离开页面并再次返回时，初始化中的console.log()显示了一个模型，这就是我想要的。但是，submitEmployee()函数上的console.log显示了两个模型。下面是控制台输出:

// first page load, shows a single object
initializing....
n {cid: "c2", attributes: Object, _changing: false, _previousAttributes: Object, changed: Object…}
// other page load
[n, n, n, n, n]
// back to original page, shows a new object
initializing....
n {cid: "c10", attributes: Object, _changing: false, _previousAttributes: Object, changed: Object…}
// submit still sees both objects, which i don't want 
n {cid: "c2", attributes: Object, _changing: false, _previousAttributes: Object, changed: Object…}
n {cid: "c10", attributes: Object, _changing: false, _previousAttributes: Object, changed: Object…}

谢谢!