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ASP.NET MVC rendering model is not what I expect

Today I have a problem and I can’t get the weather. I understand something is wrong in ASP.NET MVC (and possibly MVC in general), or I missed something about its implementation.

So, I have a simple model hierarchy:

public class Child
{
    public Child(int notId, bool isSelected, string text)
    {
        NotId = notId;
        IsSelected = isSelected;
        Text = text;
    }

    public Child(){}

    // naming: just to make sure I do not mess with some
    // conventional infrastructure
    public int NotId { get; set; }
    public bool IsSelected { get; set; }
    public string Text { get; set; }
}

public class Parent
{
    public List<Child> Children { get; set; } 
}

Here are my HomeControllerEdit actions :

[HttpGet]
public ActionResult Edit()
{
    var parent = new Parent
                    {
                        Children = new List<Child>
                                {
                                    new Child(1, true, "a"),
                                    new Child(2, false, "b")
                                }
                    };
    return View(parent);
}

[HttpPost]
public ActionResult Edit(Parent parent)
{
    parent.Children = new List<Child>
                        {
                            new Child(4, false, "c"),
                            new Child(5, true, "d")
                        };
    return View(parent);
}

Hese is my Edit.aspxview:

<!-- Standart HTML elements ommited --> 
<% Html.BeginForm(); %>
<% for (var i = 0; i < Model.Children.Count; i++){%>
<div>
    <%=Html.LabelFor(m => m.Children[i].IsSelected)%>
    <%=Html.EditorFor(m => m.Children[i].IsSelected)%> <!-- lamda -->
    <%=Html.CheckBoxFor(m => m.Children[i].IsSelected)%> <!-- lamda -->
    <%=Html.CheckBox("A", Model.Children[i].IsSelected)%> <!-- simple -->
</div>
<% } %>

<input type="submit" value="Submit" />
<% Html.EndForm();%>

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[HttpPost]
public ActionResult Edit(Parent parent)
{
    ModelState.Remove("Children");
    parent.Children = new List<Child>
    {
        new Child(4, false, "c"),
        new Child(5, true, "d")
    };
    return View(parent);
}
+2

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