V7.2.1

I'm using the following implementation of UmbracoVirtualNodeRouteHandler to allow me to have an edit page for a dashboard on my site without creating a node. (There really, really is no need for a node, I should just be able to create an ActionResult).

/// <summary>
/// The project virtual node route handler.
/// </summary>
public class ProjectVirtualNodeRouteHandler : UmbracoVirtualNodeRouteHandler
{
    /// <summary>
    /// returns the <see cref="IPublishedContent"/> associated with the route.
    /// </summary>
    /// <param name="requestContext">
    /// The request context.
    /// </param>
    /// <param name="umbracoContext">
    /// The umbraco context.
    /// </param>
    /// <returns>
    /// The <see cref="IPublishedContent"/>.
    /// </returns>
    protected override IPublishedContent FindContent(RequestContext requestContext, UmbracoContext umbracoContext)
    {
        UmbracoHelper helper = new UmbracoHelper(umbracoContext);
        string alias = typeof(DashboardPage).Name;
        return helper.TypedContentAtRoot()
            .First()
            .Descendants()
            .First(d => d.DocumentTypeAlias.InvariantEquals(alias));
    }
}

This, combined with the following route, allows me to render the page with a form on it without creating a node.

RouteTable.Routes.MapUmbracoRoute(
"ProjectEdit",
"Dashboard/Edit/{id}/",
new
{
    controller = "DashboardPage",
    action = "Edit"
},
new ProjectVirtualNodeRouteHandler());

This all works great until it's time to post the form.

Adding another ActionResult to the same controller (It's a Surface/RenderMVC hybrid) doesn't allow me to post the form at all. I get an error

No route in the route table matches the supplied values.

Moving the ActionResult to another controller allows me to post the form but the RenderModel is now wrong as the FindContent in my ProjectVirtualNodeRouteHandler is intercepting the call even though I am posting to another location.

How can I post from this form from this location without creating a node I shouldn't have to create?

Either implementation of the following markup (typed/untyped) fails miserably.

@using (Html.BeginUmbracoForm<FormsController>("SubmitDashboardForm", null, new { enctype = "multipart/form-data" }, FormMethod.Post))