Mysterious routing issue

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MVC

routing

I may just tired, frustrated and grabbing at straws but here goes.

I tried using Areas in my MVC Web app and was running into issues with resolving paths so I moved my admin page back in to the main area.

When I did the Admin controller gets called which in turn invokes the Admin/Index page which loads in a partial page and it all gets filled with a list of List<commentviewmodel> information that I send it but when it's done servicing the list, and I don't know at what point this happens I get an exception saying that the page is looking for a list List<userviewmode> of information that's required in my Home/Index page??

Layout.cshtml - Admin page is the one in question

<li>@Html.ActionLink("Home", "Index", "Home")</li>
<li>@Html.ActionLink("About", "About", "Home")</li>
<li>@Html.ActionLink("Contact", "Contact", "Home")</li>
<li>
    @if (User.IsInRole("Admin"))
    {
        @Html.ActionLink("Admin", "Index", "Admin")
    }
</li>

RouteConfig.cs

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
        namespaces: new string[] { "JaxCoderV20.Controllers" }
    );
}

AdminController.cs

[HttpGet]
public ActionResult Index()
{
    List<CommentViewModel> list = UberService.GetAllCommentsExtended();

    return View(list);
}

and a portion of Index.cshtml

@using JaxCoderV20.ViewModels;
@Model IEnumerable<jaxcoder.viewmodels.commentviewmodel>

    @{
        ViewBag.Title = "Admin Main Page";
        ViewBag.Description = "Main entry point/page for Admin";
        Layout = "~/Views/Shared/_Layout.cshtml";
    }

   .............. More suuff here ............

<div id="approval" class="tab-pane">
     <a href="DownloadHandler.ashx?fileid=922528934">Article Source (81KB)</a>
     @foreach (var item in Model)
     {
        Html.RenderPartial("_CommentView", (CommentViewModel)item);
     }
</div>

I'm new to MVC so I'll probably be posting a lot of questions here so if you spot that I'm doing something wrong pipe up and let me know so I don't flouder latter. Thanks y'all