Routing does not work in my asp.net app - asp.net-mvc-3

Question

I have 4 routes defined 5 different urls. Tested a lot with RouteDebugger but can not solve.
The problem is that Top 2 links always use {controller}/{action}/{id} this route which is root1 and can not redirect to proper pages.
Links
#Html.ActionLink("Go Index by name", "Page", "Home", new { name="contact"}, null)
#Html.ActionLink("Go Index by id", "Index", "Admin", new { id=2}, null)
#Html.ActionLink("Go Index by id and name", "Page", "Home", new { name = "contact", id = 2 }, null)
#Html.ActionLink("Root Admin", "Index", "Admin")
#Html.ActionLink("Root", "Index", "Home")
Here is the Map.Route
routes.MapRoute("root1",
"{controller}/{action}/{id}",
new { controller = "Admin", action = "Index" });
routes.MapRoute("root2",
"{controller}/{action}/{name}",
new { controller = "Home", action = "Page" });
routes.MapRoute("root3",
"{controller}/{action}/{name}/{id}",
new { controller = "Home", action = "Page" });
routes.MapRoute("root4",
"{controller}/{action}/{name}",
new { controller = "Home", action = "Index", name = UrlParameter.Optional });

Answer 1

These are the routes I have set up and it seems to hit each one correctly.
Note that root3 has been moved to the top since root2 will match that as well. also, the validation for root1 with id as King Julian suggested
The route:
#Html.ActionLink("Root Admin", "Index", "Admin")
should not match root1 nor root2 since there is no default for id and name respectively in the route definition
routes.MapRoute("root3",
"{controller}/{action}/{name}/{id}",
new { controller = "Home", action = "Page" });
routes.MapRoute("root1",
"{controller}/{action}/{id}",
new { controller = "Admin", action = "Index" },
new { id = #"\d+" });
routes.MapRoute("root2",
"{controller}/{action}/{name}",
new { controller = "Home", action = "Page" });
routes.MapRoute("root4",
"{controller}/{action}/{name}",
new { controller = "Home", action = "Index", name = UrlParameter.Optional
});

Answer 2

Add constraints to your routes. For example:
routes.MapRoute(
"root1",
"{controller}/{action}/{id}",
new { controller = "Admin", action = "Index" },
new {id = #"\d+" }
);
Will ensure that root1 only matches when id is an integer. Otherwise, root2 would catch it.