ASP.NET MVC 4 - ModelBinder bug

So I was playing around with my ASP.NET MVC 4 solution. Every thing worked fine kept adding things but something odd started happening.

One of my Models properties was null, even though I had items in the Json passed to it.

This was the javascript object/json passed it it:

var obj = {
    "plc": "False",
    "al": ["386", "710"],
    "pl": ["9530", "211", "783"]
};

I was using a Custom Model binder ... thought that might be the issue so I turned it off.

Tried using the JavaScriptSerializer from .NET to see it that worked:

var reader = new StreamReader(Request.InputStream);
Request.InputStream.Position = 0;
var readToEnd = reader.ReadToEnd();

var javaScript = new JavaScriptSerializer();
var searchFarmOptions = javaScript.Deserialize<Test>(readToEnd);

Got all the properties set ... WOOT.

So I tried a clean ASP.NET MVC 4 solution. To reproduce the bug.

This is from the Index.cshtml view

@{
    ViewBag.Title = "title";
}

<h1>Title</h1>
Testing ... 
<script src="/Scripts/jquery-1.8.2.min.js" type="text/javascript"></script>
<script>
$(function() {
    var obj = {
        "1pllort": "False",
        "1plc": "true",
        "al": ["386", "710"],
        "pl": ["9530", "211", "783"]
    };

    var options = {
        "contentType": "application/json; charset=UTF-8",
         "type": "POST",
         "data" : JSON.stringify(obj)
    };
    $.ajax("/Home/TestPost", options).done(function(data) {
        console.log(data);
    });
});
</script>

This is my HomeController

using System.Collections.Generic;
using System.Web.Mvc;

namespace MvcApplication3.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            return View("Index");
        }

        [HttpPost]
        public ActionResult TestPost(Test model)
        {
            return Json(model);
        }
    }

    public class Test
    {
        public List<int> PL { get; set; }
        public List<int> AL { get; set; }
        public bool PLC { get; set; }
        public bool ALC { get; set; }
    }
}

Yes, the bug is still there.

Whenever I have a property starting with "pl" as my list name is .. the "pl" list is null.

Also, it could be any name starting with "pl" ... like "plchecked"

If I rename the "plc" to "cpl" its working.

So what is going on here ... is there any naming restrictions in the model binder? What am I missing here?

Update 1

Work

PL server side now have the right values, etc. not null, but the list of numbers.

var obj = {
    "pl": ["9530", "211", "783"],
    "1plc": "false",
    "pl-some-odd-value": "false",
    "al": ["386", "710"],
    "alc": "false"
};

Don't work

PL server side now have null value.

var obj = {
    "pl": ["9530", "211", "783"],
    "al": ["386", "710"],
    "alc": "false",
    "pl-odd-value": "false"
};

Work

PL has the 3 values som the json object string ...

var obj = {
    "pl": ["9530", "211", "783"],
    "al": ["386", "710"],
    "alc": "false",
    "odd-value-pl": "false"
};